What type of ion is formed when an atom loses electrons?

• Cation

• Anion

• Polyatomic ion

• Neutral atom

Which of the following is an example of a polyatomic ion?

• OH-

• Cl-

• H2O

• Na+

What is the charge of the X2 2- ion?

• 1+

• 3-

• 2-

• 0

How many valence electrons does each X atom have in the X2 2- ion?

• 3

• 2

• 4

• 5

To which group does element X belong if it has four valence electrons?

• Group 15

• Group 13

• Group 14

• Group 16

What is the 'magic number' of valence electrons for most atoms to achieve stability?

• 10

• 8

• 7

• 6

How many valence electrons does chlorine need to achieve stability?

• 1

• 4

• 3

• 2

How many chlorine atoms are needed to bond with one X atom to form a stable compound?

• 2

• 4

• 1

• 3

What type of bond is formed between X and chlorine?

• Covalent bond

• Hydrogen bond

• Ionic bond

• Metallic bond

What is the formula of the compound formed by X and chlorine?

• XCl

• XCl2

• XCl3

• XCl4