Posted by Chelsea on Friday, October 10, 2008 at 1:27pm.
1. Which statement about subatomic particles is NOT true? (1 point)
Protons and neutrons have almost the same mass.
Protons and electrons have opposite charges.
Unlike protons and electrons, neutrons have no charge.
Protons and neutrons have the same charge.
2. Which of the following is unique for any given element? (1 point)
the number of neutrons
the charge on the electrons
the number of protons
the mass of a neutron
3. Suppose an atom has a mass number of 35. Which statement is true beyond any doubt? (1 point)
The atom has an odd number of neutrons.
The atomic number is less than 17.
The atom is not an isotope.
The number of protons in the nucleus
does not equal the number of neutrons.
5. In Rutherford’s gold foil experiment, some of the____________________aimed at gold atoms bounced back, suggesting that a solid mass was at the center of the atom. (1 point)
6. Neutrons and_______________have almost the same mass. (1 point)
7. Which of the three subatomic particles—proton, electron, or neutron—has the least mass? (1 point)
8. If an atom has 32 protons and 38 neutrons, what is its mass number? (1 point)
9. Most calcium atoms have an atomic number of 20 and a mass number of 40, but some calcium atoms have a mass number of 48. What word could you use to describe these two kinds of calcium atoms? (1 point)
10. In the nucleus of an atom, there are 15 protons and 16 neutrons. What is the atomic number of this isotope? (1 point)
- Science - DrBob222, Friday, October 10, 2008 at 2:39pm
We don't do your homework for you. We will be happy to help you get started if you show us what you don't understand. Pick ONE problem and tell us what you are having trouble with. Then we can talk about the other nine.
- Science - christinachka, Monday, November 24, 2008 at 9:10pm
hi im a russian ?/ i got a myspace if u wanna add me(:
well my sissys name is alesia she has poofy hair
Answer this Question
More Related Questions
- Science - Which statement about subatomic particles is NOT true? A.) Protons and...
- Science - Hi i have a science exam on tuesday and really need some help to see ...
- chemistry - Which of the following statements about protons are false? (Select ...
- Chemistry - Atom A- 6 protons, 6 electrons, 7 neutrons Atom D- 6 protons, 6 ...
- Chemistry - one of the tin isotopes has 50 protons and 63 neutrons. another ...
- chemistry - name the elementwhich has the following numbers of particles: a.26 ...
- chem - how many protons, nnutrons, atomic mass, mass number, and charge to each ...
- Chemistry question! - Please help! What do both an atom and an ion of the ...
- science - When a parent radioactive nucleus splits by ejecting an alpha ...
- chemistry - The weight of an atom is made up of what? protons and electrons ...