Match the subatomic particles ( 1 to 3 ) to each of the descriptions below. (4.4) 1. protons 2.

step 1 Here we have protons and neutrons. They are used to define atomic mass, and number of protons is

Match the subatomic particles ( 1 to 3 ) to each of the...

Match the subatomic particles ( $\mathbf{1}$ to $\mathbf{3}$ ) to each of the descriptions below. (4.4)
1. protons
2. neutrons
3. electrons
a. atomic mass
b. atomic number
c. positive charge
d. negative charge
e. mass number $-$ atomic number

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Key Concepts

Neutron Number

The neutron number is found by subtracting the atomic number from the mass number; it indicates the number of neutrons within the nucleus, which influences the isotope and stability of an atom.

Atomic Mass

Atomic mass is the total mass of an atom, mainly contributed by protons and neutrons. It can be used to calculate the mean mass of the element's naturally occurring isotopes.

Atomic Number

The atomic number is defined as the number of protons in an atom's nucleus and uniquely identifies each element on the periodic table.

Neutrons

Neutrons are neutral particles also found in the nucleus; they do not affect the electrical charge but add to the atomic mass. The number of neutrons can vary among atoms of the same element, leading to different isotopes.

Protons

Protons are positively charged subatomic particles located in the nucleus of an atom. They determine the identity of the element through the atomic number and contribute significantly to the mass of the atom.

Electrons

Electrons are negatively charged subatomic particles that orbit the nucleus. They play a key role in chemical bonding and reactions and determine much of an atom's chemical behavior.

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