Ionic, Polar Covalent and Nonpolar Covalent

Which compound has covalent bonds?

• H₂O

• Na₂O

• Li₂O

• K₂O

Tags

NGSS.MS-PS1-1

In the ground state, an atom of which element has seven valence electrons?

• fluorine

• sodium

• nitrogen

• oxygen

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The degree of polarity of a covalent bond between two atoms is determined by calculating the difference in their

• atomic radii

• electronegativities

• melting points

• ionization energies

When an F atom becomes an F^- ion, the F atom

• gains a proton

• gains an electron

• loses a proton

• loses an electron

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which ion in the ground state has the same electron confi guration as an atom of neon in the ground state?

• Ca²⁺

• Li⁺

• Cl^-

• O^2-

Tags

NGSS.HS-PS1-1

Which element is classified as a metalloid?

• Te

• Hg

• S

• I

Tags

NGSS.HS-PS1-1

The least polar bond is found in a molecule of

• HI

• HCl

• HF

• HBr

When a Mg²⁺ ion becomes a Mg atom, the radius increases because the Mg²⁺ ion

• gains 2 protons

• loses 2 protons

• gains 2 electrons

• loses 2 electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Elements that have atoms with stable valence electron configurations in the ground state are found in

• Group 1

• Group 2

• Group 8

• Group 18

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2