Question

mass and electrical charge
there are two properties of protons, neutrons and electrons
that are especially important:

• mass
• electrical charge.

particle	mass	charge
neutron
electron

the atoms of an element contain ______

Explanation:

Step1: Recall particle properties

Protons have a mass of approximately 1 atomic mass unit (amu) and a positive charge ($+1$). Neutrons have a mass of approximately 1 amu and no charge ($0$). Electrons have a negligible mass (about 0 amu) and a negative charge ($-1$).

Step2: Fill the table

• For Proton: Mass = 1, Charge = $+1$
• For Neutron: Mass = 1, Charge = $0$
• For Electron: Mass = 0, Charge = $-1$

Answer:

Particle	Mass	Charge
Neutron	1	$0$
Electron	0	$-1$