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2. Name of Element: Helium

Element symbol: He

Atomic number: 2

Mass number: 5

Protons: 2

Neutrons: 3

Electrons: 1

Charge: Cation (positive)

3. Name of Element: Nitrogen

Element symbol: N

Atomic number: 7

Mass number: 14

Protons: 7

Neutrons: 7

Electrons: 7

Charge: Neither cation nor an anion because the numbers of protons and electrons are neutral.

4. Name of Element: Flourine

Element symbol: F

Atomic number: 9

Mass number: 19

Protons: 9

Neutrons: 10

Electrons: 9

Charge: Anion (Negative)

Note:

• Mass number = protons + neutrons
• Neutrons = Protons or atomic number — mass number
• Atomic number = Protons
• Electrons = Protons
• Cation have a positive charge and can be easily distinguish when an element has more protons than electrons.
• Anion have a negative charge and can be distinguish when an element has more electrons than protons.