1st Semester Final Practice

Front

Why is the mole used when measuring the atom?

Back

Atoms are extremely tiny particles, and need extremely large quantities to be made visible.

Front

How many moles of copper are 4.57 x 10^13 atoms of copper?

Back

7.59 x 10^-11 moles

Front

F ionizes to a charge of ________.

Back

-1

Front

What is the chemical name for AgF?

Back

silver fluoride

Front

As you move across the periodic table, atoms tend to get smaller because _____________.

Back

the atoms have more protons.

Front

Define a mole in chemistry.

Back

A mole is a unit of measurement used to express amounts of a chemical substance, defined as exactly 6.022 x 10^23 particles.

Front

What is the significance of Avogadro's number?

Back

Avogadro's number (6.022 x 10^23) is the number of atoms, ions, or molecules in one mole of a substance.

Front

Explain ionization energy.

Back

Ionization energy is the energy required to remove an electron from an atom or ion.

Front

What happens to atomic size as you move down a group in the periodic table?

Back

Atomic size increases as you move down a group due to the addition of electron shells.

Front

What is the charge of a sodium ion (Na+)?

Back

+1