science,

1. How many periods are there in the periodic table? *
1 point

6

7

8

9
2. How many groups are there in the periodic table? *
1 point

15

16

17

18
3. State the number of valence electrons in an atom of Sulfur. *
1 point

2

4

6

8
4. State the number of valence electrons in an atom of Calcium. *
1 point

2

4

6

8
5. State the number of valence electrons in an atom of Chlorine. *
1 point

1

3

5

7
6. State the number of valence electrons in an atom of Arsenic. *
1 point

1

3

5

7
7. Give the name and symbol for the element that corresponds to atomic number 10. *
1 point

Boron, B

Nitrogen, N

Neon, Ne

Nickel, Ni
8. Give the name and symbol for the element that corresponds to atomic number 18. *
1 point

Fluorine, Fl

Argon, Ar

Arsenic, As

Silver, Ag
9. Give the name and symbol for the element that corresponds to atomic number 36. *
1 point

Krypton, Kr

Potassium, K

Palladium, Pd

Xenon, Xe
10. Give the name and symbol for the element that corresponds to atomic number 90. *
1 point

Titanium, Ti

Zirconium, Zr

Thallium, Tl

Thorium, Th
11. Which of the following pairs of elements belong to the same period? *
1 point

Na and Cl

Na and Li

Na and Cu

Na and Ne
12. Which of the following pairs of elements belong to the same group? *
1 point

H and He

Li and Be

C and Pb

Ga and Ge
13. An element found in period 4 would have how many energy levels/shells? *
1 point

Three

Four

Five

Six
14. What group number(s) are the transition elements in? *
1 point

Group 1

Group 2

Groups 3-12

Group 8
15. Why would you expect strontium to be chemically more similar to calcium? *
1 point

They are in the same family/group.

They are in the same period.

They have the same atomic number.

They have the same atomic mass.
16. What is the heaviest noble gas? *
1 point

Helium

Radon

Flourine

Astatine
17. What is the heaviest alkaline earth metal? *
1 point

Hydrogen

Beryllium

Francium

Radium
18. A researcher wants to experiment with an element that reacts like phosphorus (P) but has a greater atomic mass. Which element should the researcher select for the experiment? *
1 point

Nitrogen (N)

Sulfur (S)

Arsenic (As)

Silicon (Si)
19. A model of an atom is shown below. Which element is represented by this model of an atom? *
1 point

Boron (B)

Carbon (C)

Neon (Ne)

Sodium (Na)
20. A chemist made the table below to record some atomic properties of four elements. Based on the information in the table, which conclusion about the chemical reactivity of these elements is valid? *
1 point

Boron is the most reactive because it has the most protons.

Fluorine is the most reactive because it has 7 electrons in the outer shell.

Silicon is the most reactive because it has an equal number of protons and neutrons.

Gallium is the most reactive because it has many more neutrons than protons.

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  1. Two observations:
    1. I don't see any attempt on your part to answer any part of the 20 questions.\
    2. Are you trying to use up as much space as possible. You've even made it inconvenient to read the questions. I assume this is a test and you want us to do the test for you.

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    DrBob222
  2. Its really good

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