Part 6 - Subatomic Particles

• proton

• neutron

• electron

3 types of subatomic particle

1.6726 × 10-²⁴ g

mass in g of proton

1.675 × 10-²⁴ g

mass in g of neutron

9.10938 × 10-²⁸ g

mass in g of electron

1.0073 amu

atomic mass unit of proton

1.0087 amu

atomic mass unit of neutron

5.486 × 10^-4 amu

atomic mass unit of electron

nucleons

• either a proton or a neutron that makes up the center (nucleus) of an atom

• found in the nucleus of the atom

• not affected/involved in chemical reactions or bonding

electrons

what are involved in chemical reactions if nucleons (proton/neutron) are not involved?

proton

identity or ID no. of the element

protons

no two different elements contain the same no. of ____

electrons

no. of protons is equal to the no. of ____

when an atom loses or gains electrons

When do electrons and protons become unequal?

element

atomic symbol X stands for?

mass number

atomic symbol A stands for?

atomic number

atomic symbol Z stands for?

charge

atomic symbol Q stands for?

element

a pure substance which cannot be decomposed into simpler substances

mass number

protons + neutrons = _____

atomic number

aka. the proton, defines the element

charge

Protons - Electrons = _____

isotopes

atoms of the same element with the same number of protons but different numbers of neutrons (hence different mass no.)

isotones

atoms with the same number of neutrons but different number of protons and mass number

isobars

atoms of a different element with the same mass number but different atomic number

proton & electron

which among the subatomic particles are electrically charged?

proton & neutron

mass number is the sum of ____