The electronic structures of atoms P and Q are shown. P and Q react to form an ionic compound. What is the formula of this compound?

• Q₂P

• P₂Q

• P₂Q₆

• Q₂P₆

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The electronic configuration of an ion is 2.8.8. What could this ion be?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many electrons are shared between the atoms in a molecule of methane, CH₄, and in a molecule of water, H₂O?

• Methane = 4

  Water = 2

• Methane = 4

  Water = 4

• Methane = 8

  Water = 2

• Methane = 8

  Water = 4

Which compound has both ionic and covalent bonds?

• ammonium chloride

• carbon dioxide

• ethyl ethanoate

• sodium chloride

The diagram shows the positions of some elements in the Periodic Table. Which elements form ionic bonds with oxygen?

• W only

• W and X only

• Z only

• Y and Z only

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The diagram shows an outline of part of the Periodic Table. Which two elements could form a covalent compound?

• W and X

• W and Y

• X and Y

• X and Z

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The proton numbers of four elements are shown. Which element forms a singly charged positive ion in its salts?

• A (proton number = 34)

• B (proton number = 35)

• C (proton number = 36)

• D (proton number = 37)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which compound has ionic bonds?

• hydrogen chloride

• methane

• sodium chloride

• water

Tags

NGSS.HS-PS1-3

The following list the electronic structures of four atoms:

W : 2, 1

X : 2, 7

Y : 2, 8, 4

Z : 2, 8, 8

Which two atoms combine to form an ionic compound?

• W and X

• W and Y

• X and Y

• X and Z

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The following shows the electron structures of four elements.

W = 2, 6

X = 2, 8

Y = 2, 8, 1

Z = 2, 8, 7

Which pair of atoms will form a covalent substance?

• two atoms of W

• two atoms of X

• an atom of W and two atoms of Y

• an atom of Y and an atom of Z

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2