When a sodium atom reacts with a chlorine atom to form a compound, the electron configurations of the ions forming the compound are the same as those in which noble gas atoms?

• krypton and neon

• krypton and argon

• neon and helium

• neon and argon

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which electron-dot diagram represents H₂?

• A

• B

• C

• D

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NGSS.MS-PS1-1

Which is the correct electron-dot formula for a molecule of chlorine?

• A

• B

• C

• D

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

A barium atom attains a stable electron configuration when it bonds with

• one chlorine atom

• two chlorine atoms

• one sodium atom

• two sodium atoms

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which pair of elements below will form a compound with the greatest ionic character?

• Pb and F

• Ca and O

• Na and Cl

• Cs and N

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NGSS.HS-PS1-3

Which pair of elements forms a bond with the least ionic character?

• P–Cl

• Br–Cl

• H–Cl

• O–Cl

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NGSS.HS-PS1-3

Based on your Reference Tables, the atoms of which of these elements have the strongest attraction for electrons in a chemical bond?

• N

• Na

• P

• Pt

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

As a chlorine atom becomes a negative ion, the atom

• gains an electron and its radius increases

• gains an electron and its radius decreases

• loses an electron and its radius increases

• loses an electron and its radius decreases

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which compound contains ionic bonds?

• NO

• NO₂

• CaO

• CO₂

The bonds in BaO are best described as

• covalent, because valence electrons are shared

• covalent, because valence electrons are transferred

• ionic, because valence electrons are shared

• ionic, because valence electrons are transferred

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

NGSS.HS-PS1-3