Ions

Question 1

By definition, ions are always __________.

Answer 1

charged

Question 2

When an atom loses electrons, it becomes __________.

Answer 2

positively charged

Question 3

Lewis Symbol for oxide ion (previously an oxygen atom before it ionized)

Answer 3

Lewis symbol dots: 8
Lewis symbol brackets: yes
protons: 8
electrons: 10
charge: 2−

Question 4

Lewis Symbol for potassium ion (previously a potassium atom before it ionized)

Answer 4

Lewis symbol dots: 0
Lewis symbol brackets: no
protons: 19
electrons: 18
charge: 1+

Question 5

Polyatomic ions: carbonate ion

Answer 5

charge: 2−
chemical formula: CO3 2−

Question 6

Polyatomic ions: CN −

Answer 6

charge: 1−
name: cyanide ion

Question 7

Polyatomic ions: HCO3 −

Answer 7

charge: 1−
name: bicarbonate ion

Question 8

Polyatomic ions: hydroxide ion

Answer 8

charge: 1−
chemical formula: OH-

Question 9

Polyatomic ions: NH4 +

Answer 9

charge: 1+
name: ammonium ion

Question 10

Polyatomic ions: nitrate ion

Answer 10

charge: 1-
chemical formula: NO3

Question 11

Polyatomic ions: phosphate ion

Answer 11

charge: 3-
chemical formula: PO4 3−

Question 12

Polyatomic ions: SO4 2−

Answer 12

charge: 2-
name: sulfate ion

Question 13

An ion with a charge of 2− has __________.

Answer 13

gained 2 electrons

Question 14

How many valence electrons are present in an aluminum ion?

Answer 14

8

Question 15

Which ion below is a polyatomic cation?

Answer 15

ammonium ion