Question

complete the table below by referencing a periodic table.

element	chemical symbol	atomic number	atomic mass	mass number	# of protons	# of electrons	show work	mass number - # of protons = # of neutrons
aluminum	al	13	26.98	27	13	13	27 - 13 = 14
potassium	k	19	39.10	39	19	19	39 - 19 = 20
argon	ar	18	39.95	39	18	18	39 - 18 = 21
lead	pb	82	207.2	207	82	82	207 - 82 = 125

match each item with the correct statement.
____ 1. the smallest particle of an element that retains the properties of that element
____ 2. a positively charged subatomic particle
____ 3. a negatively charged subatomic particle
____ 4. a subatomic particle with no charge
____ 5. the central part of an atom containing protons and neutrons
a. proton
b. nucleus
c. atom
d. electron
e. neutron

Explanation:

1. An atom is the smallest particle of an element that retains its properties.
2. A proton is a positively - charged subatomic particle.
3. An electron is a negatively - charged subatomic particle.
4. A neutron is a subatomic particle with no charge.
5. The nucleus is the central part of an atom containing protons and neutrons.

Answer:

1. C. ATOM
2. A. PROTON
3. D. ELECTRON
4. E. NEUTRON
5. B. NUCLEUS