Chemistry Knowledge Check

Front

What color of light does a hydrogen atom emit when an electron transitions from the n=6 energy level to the n=2 energy level?

Back

Violet light is emitted during this transition.

Front

How many protons does Silver have?

Back

Silver has 47 protons.

Front

What is the electron configuration of a neutral atom with 6 valence electrons?

Back

1s² 2s² 2p⁶ 3s² 3p⁴.

Front

How many valence electrons does an atom with the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁴ have?

Back

It has 6 valence electrons.

Front

What is the relationship between bond strength and melting point in metals?

Back

Stronger bonds typically result in higher melting points.

Front

What is the name of the compound NH₄HCO₃?

Back

Ammonium bicarbonate.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the significance of valence electrons in chemical bonding?

Back

Valence electrons determine how an atom can bond with other atoms.

Front

What is the difference between ionic and covalent bonds?

Back

Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons.

Front

What is the formula for calculating the number of neutrons in an atom?

Back

Number of neutrons = Atomic mass - Atomic number.