Science (atoms) 8th grade

47,401 results

Science (atoms) 8th grade

Chlorine has an average atomic mass of 35.45 amu. The 2 naturally occurring isotopes of chlorine are chlorine-35 and chlorine-37. Why does this indicate that most chlorine atoms contain 18 neutrons?

8th grade Science

How does the behavior of atoms and molecules differ between solids liquids and gasses?

Science (atoms) 8th grade

What is the usual state of matter for covalent compounds? Ionic compounds? What is the smallest particle for each?

science (8th grade)

Which of the following is not a characteristic of a crystal? a. The arrangement of the atoms in a crystal determines its shapes. b. A crystalline structure is always geometric. c. Crystals are classified according to their mineral content. Please do not double post.

8th grade chemistry

which of the following molecules does not contain 5 atoms? A. CaCO3 B. Mg(OH)2 C. NaHCO3 D. Fe2O3

science

How many atoms of carbon are needed to produce 0.45 mol Al? 3C + 2Al2O3 4Al + 3CO2 A. 2.6 × 1026 atoms B. 9.7 × 1024 atoms C. 3.0 × 1022 atoms D. 2.0 × 1023 atoms

8th Grade

Me and my friend are making our own 8th grade binder, you know like writing down planns for our 8th grade year. Here are the sections: - To-Do-List - Doodles (if you are bored) - Projects that are do (school plans) - Graduation Plans (speech, to-do-list, etc.) - Dates for ...

8th Grade Earth Science Help?

Which of the following terms refers to the time it takes for one-half of the radioactive atoms in a sample of a radioactive element to decay? - relative age - absolute age - potassium-argon data - half-life** Is my answer correct?

science

i am in 7th grade accelerated science, so i am learing 8th grade material. I am having some difficulties with covelant and ionic bonds. My lab is due tomorrow and i have a quiz on Wed. If anyone can help me understand this better i would be greatful. Thank-you.

8th grade

how do atoms in covalent bonds become slightly negative or slightly positive?

Physical Science

Hi... well anyways so I am in 7th grade but I'm taking 8th grade science...I think...I know for sure that I am in Accelerated 7th grade science so if that helps at all, there you go:) Back to the subject I'm really confused with acceleration calculation and velocity, time, ...

Science

How many atoms of aluminum can be produced by the decomposition of 47.1 g of Al2O3? (Hint: Write and balance the equation first.) The products are oxygen gas and aluminum metal (Al) A) 1.11 X 10^24 Al atoms B) None of these C) 1.39 X 10^23 Al atoms D) 5.56 X 10^23 Al atoms E) ...

8th grade chemistry

2CuSO4 what does the information above represent? (A) two molecules made of one copper atom, one sulfur atom, and four oxygen atoms. (B) two elements made of one copper atom, one sulfur atom, and four oxygen atoms. (C) two copper atoms, one sulfur atom, and four oxygen atoms...

science

what are the formulas for speed, distance, and acceleration for 8th grade science

Science 8R - help!

I need a definition for Lines of force (8th grade science regents level, ny)

Science

How do calculate specific heat and thermal energy?Science is hard in the 8th grade .

what can i compare middle school to?

what can i compare middle school to? (use in metaphor), based on 6th, 7th, and 8th grade. for example playing monopoly 6th grade - buying properties, 7th grade- adjusting to the game, 8th grade - stress over money

8th grade

what is science

Science

How do I calculate between the race of two automobiles in kilometer speed this is a 8th grade science question

8th grade

im in advanced math so i do 8th grade math and i don't understand how too gragh the fractions in equations like y=2/3x+1

english

- Computers - English - Foreign Languages - Health - Home Economics - Math - Music - Physical Education - Science - Social Studies GRADE LEVELS - Preschool - Kindergarten - Elementary School - 1st Grade - 2nd Grade - 3rd Grade - 4th Grade - 5th Grade - 6th Grade - 7th Grade - ...

8th grade science

What is radiation?

Science

What is a good science project to do? I am in 8th grade and am studying earth science. I need to present the project in front of class. Im really nervouse.

science (8th grade)

Which of the following is not a characteristic of a crystal? a. The arrangement of the atoms in a crystal determines its shapes. b. A crystalline structure is always geometric. c. Crystals are classified according to their mineral content. http://en.wikipedia.org/wiki/Crystal

8th grade Math

I'm actually in 7th grade, but I'm doing 8th grade pre-algebra, but anyway, here: I'm supposed to simplify these four problems and I don't really understand how: 28s (15 power) ____ 42s (12 power) 4m+(n[7th power]m) 63m(5 power)n(6 power) ______________________ 27mn 3a·4a(4 ...

8th grade science

what is an example of suspension

8th grade science

How do you do a ball dichotomy?

8th grade

how do I balance equasions in science?

8th grade science

What is the reprodution in bacteria, prokaryotic cells, called? A. Mitosis, B. Binary fission, C. Interphase, or D. Fusion. Thank you for helping! I need this because it's for my 9 weeks exam study guide which counts for a whole lot of my grade. Thanks!

8th grade science

how does a dandelion and a deer alike?

8th grade science

WHAT IS THE CHEMICAL STRUCTURE FOR STARCH

8th grade science

How did the broad river get its name?

8th grade science

an information on crop production

8th grade Science

What does Air Mass Consist of?

8th grade Science

In ionic bonds, what is the answer to these? Li + P and Rb + As and Pb + F and Bc + N ??

8th grade science

Why is water essential to life?

8th grade science

what does Radium bond with and what are the reactions

8th grade science

Hi! For a research project from my science class I'm having trouble trying to find an answer to the following problem. How does the Man-o-War care for their young? Thanks!

8th grade science

how does wave frequency affect the light?

8th Grade Science

At what temperature is water the most dense?

8th grade Science

What are the 3 problems solved by fluid technology???

8th grade science

why are neuclar waste products a problem?

8th grade earth science

how to find the longitude of meridians

8th grade

How do you calculate displacement and distance and velocity? (science)

8th grade science

What experiments or activities are unacceptable to do with seeds

8th grade science

What is the difference between speed and velocity?

8th grade science

Is it probable that the sun will become a supernova? Why or why not?

8th grade science :(

How does the sun's gravity influence tides?

8th Grade

Whta is a verctorican (srry i can't spell that) award when the 8th graders get one?????

8th grade science

what is the difference between sexual and asexual reproduction

8th Grade Science

If we say that gold has a density of 19.32 g/ml, at what temperature is this substance?

Science 8th grade

What is the mass of a piece of aluminum that has a volume 100.0^3?

8th grade science

what contents in magma affects a volcanos explosive?

8th grade science

What is the symbiotic relationship between scallops and sponges?

8th grade science

What leaves after a disturbance in the climax community?

science 8th grade

what will happen if a metal block that is 60°c is placed in water that is 20°c?

science 8th grade

how many periods are there in the main body of the periodic table?

8th Grade Science

Label these reactants and products: 3Fe + 2 O2> Fe3O4

Science

H2SO4. It's asking for the number of atoms and the total atoms. Do I just put 7 atoms for both questions?

Science

H2SO4. It's asking for the number of atoms and the total atoms. Do I just put 7 atoms for both questions?

Science

How do speakers work I am in 8th grade and have to write a 5 pargaph essay

Science-8th Grade

In metric, we use_______to measure volume. is the answer mass ??

8th grade science

what functions does a nuclear membrane, chromatin, and nucleolus have

8th grade, science

What recources would be required for establishing a colony in space.

8th grade science

When forces are ______ they are equal and opposite and their is ________ ___________.

8th grade science

when you bring your bicycle to a stop where does he kinetic energy it had go?

8th grade Physical Science

What is the potential energy of a 3 kilogram ball this is on the ground?

Science 8th grade

what gets hot and cold faster, solid or gas and why?

8th grade Science please help

Why is soda in an unopened bottle a homogenous mixture?

8th Grade Science

Here is another one: "The interval between two events is the ______________."

8th grade science

Explain if it is possible to have a dilute solution of a strong acid? Thanks.

8th grade science

how do ear defenders work with the big idea energy transfer

8th grade science

compare and contrast the effect of a catalyst on a chemical reaction with that of an inhibitor?

8th grade science

Is predator-prey the most important ecological relationship? Thanks everyone!

8th grade science

why does the high specific heat of water make it essential to life?

Science (8th grade)

What are some living relatives of cyrtolite retrosus? (a kind of gastropod)

8th grade science

the question is: "The absolute magnitude of a star is -12.. How would you describe its brightness?"

8th grade science

How does altitude affect the freezing, melting and boiling points of water?

8th grade science

Explain how the sun's temperature will change over time as it ages.

8th grade science

How many (total) of each atom are there in the reactants and the products of cellular respiration? PLEASE HELP ME

Science

Has anyone took the Structures and Properties test for 8th grade. I'm a student at connections and I need help.

Chem 101. Science

Rank the following samples in mass from least to greatest. a) 2 x 1023 S atoms b) 0.25 mol of Cu atoms c) 2 mol of N atoms d) 6 x 1023 Na atoms

Math

Theo made the table below to show the number of middle school students who attented the last football game. if this data were displayed in a circle graph, how many degrees would be in the sector representing the 8th grade Grades 6,7,8 # of students in 6th grade: 375 7th grade...

Science 8th grade

A cell digests proteins through a ___________ process? Where I can I get some information on this thanks

8th grade Science

The density of salt(sodium chloride) is 2.16g/mL. What is the volume of 216g of this solid?

8th grade science

why is diffusion important to living things? (organisms) u get full credit no worries! =]

8th grade science

Describe the motion of a bicycle in a race in terms speed,velocity,acceleration.

science

Im 13 in the 8th grade and i need help on figurinmg out simularites between mitosis and meosis please help thanks :]

Science 8th Grade

In what ways can outside forces affect an object's motion, position, and shape?

Science

Find the amount Atoms and the total amount of elements for each formula C4H10 2 elements 14 atoms H4Mg3Si2O9 4 elements 18 atoms C6H7O2(OH)3 3 elements 18 atoms Pb(NO3)2 3 elements 9 atoms

Ms.Sue (ONLY)

can you plz help me in science? PLZ HELP ME! YOU HELP ALL THE TIME! *begs* plz help! i am my knees!!!!! (really i am!) its called "science 8th grade"

8th grade math

I am in 8th grade math as a sixth grader. I am stuck on one problem. It is this: You are making a necklace that is 9 inches long. You use 6 beads for each inch. what integer is the change in your supply of beads after making the necklace?

fractions

Mr.shafier has been teaching school for 10 years.For 6 of those years he taught 8th grade.what fraction represents the time Mr.shafier has not been teaching 8th grade?I knoe the answere is 2 5ths. but how do i show work?HELP!!!!!!!!!!!!!!!

Science (atoms) 8th grade

Speeds up or slows down? By stirring a gas in a liquid, its solubility ____________ the dissolving process. High or low? A gas's solubility is is faster in a liqud when under __________. How do the methods of speeding the rate of solution for dissolving a solid in a liquid ...

Physical Science 8th grade

How does metallic bonding contribute to Luster, Heat conductivity, Ductability, and malleability?

8th grade science

what is something that compares a measurement to the real or accepted value, and it has these letters in its name: acgcauc

8th grade science

infer why deposits form in the steam vents of irons in some parts of the country. thank you.

science, 7th,6th,8th,9th grade

In what three ways can machines make work easier?

8th grade

i have a project in science and i can't seemed to find the explanation of an element's, silver, symbol. Thanks so much!!!!!!!!!!!!!!

8th grade science

Good hypothesis for does the human tongue have definite areas for certain tastes

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