Ion Formation

Which of these statements about a negative ion is true?

• It has an equal number of protons and electrons.

• It has more protons that electrons

• It has more electrons than protons

What is an ion?

• An atom with extra neutrons

• A charged particle

• An atom that has equal protons and electrons

• A particle with a different atomic mass

How do metal atoms form ions?

• They lose electrons to form negative ions

• They gain electrons to form positive ions

• The lose electrons to form positive ions

Bromine is in Group 7 of the periodic table. What is the charge on its ions?

• -1

• -2

• 1

Identify the ion based on the loss or gain of electrons.

a

b

lost electrons - positive charge (+)

gained electrons - negative charge (-)

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Which of the following elements is most likely to form an anion? (Hint- non-metal)

• Magnesium

• Aluminium

• Fluorine

• Calcium

What is the charge of a cation?

• Positive

• Negative

• Neutral

• Variable

An ion with a 2- charge has 36 electrons. How many protons does it have?

• 34

• 36

• 38

• 40

What is the charge of an anion?

• Positive

• Negative

• Neutral

• Variable

Which of the following elements is most likely to form a cation? (Clue - metal)

• Oxygen

• Chlorine

• Sodium

• Sulphur