Question

quiz: atoms and classification of matter
part 1 matching: match the statement with the proper subatomic particle. some answers will be used
than once.

1. proton electron neutron
2. subatomic particle with no charge (charge 0).
3. has a negative charge.
4. determines the identity of the element.
5. found in the nucleus of the atom with protons.

together with the neutrons make up the mass of the atom.
part 2 vocabulary matching: match the word to the proper definition. not all choices will be use
atom democritus compound
atomic mass atomic number rutherford

1. the number of protons and neutrons of an atom..
2. tells the number of protons for an element.
3. discovered the nucleus..
4. smallest particle of an element.
5. made of more than one kind of atom chemically bonded.

part 3: use your periodic table to answer each of the following

1. the symbol of the element with 17 protons.
2. the number of electrons for hg
3. the number of neutrons for the element neon
4. the number of protons for an element with 15 electrons
5. the name of the element with 13 electrons.

Explanation:

1. Neutron is the subatomic particle with no charge.
2. Electron has a negative charge.
3. Proton determines the identity of the element (since atomic number = number of protons, and elements are identified by their atomic number).
4. Neutron is found in the nucleus with protons.
5. Proton (along with neutrons) makes up the mass of the atom (mass number = protons + neutrons).
6. Atomic mass is the number of protons and neutrons of an atom (approximate, as it can be a weighted average for isotopes).
7. Atomic number tells the number of protons for an element.
8. Rutherford discovered the nucleus.
9. Atom is the smallest particle of an element.
10. Compound is made of more than one kind of atom chemically bonded.
11. Chlorine (\(Cl\)) has 17 protons.
12. For a neutral atom, number of electrons = number of protons. Mercury (\(Hg\)) has an atomic number of 80, so 80 electrons.
13. Neon (\(Ne\)) has an atomic number of 10 (protons). Its atomic mass is approximately 20. Number of neutrons = atomic mass - atomic number = \(20 - 10=10\).
14. For a neutral atom, number of protons = number of electrons. So 15 protons.
15. For a neutral atom, number of electrons = number of protons = 13. The element with atomic number 13 is aluminum.

Answer:

1. neutron
2. electron
3. proton
4. neutron
5. proton
6. atomic mass
7. atomic number
8. Rutherford
9. atom
10. compound
11. \(Cl\)
12. 80
13. 10
14. 15
15. aluminum