Rockhurst Chem Review 2024

Front

How many protons are in an element with atomic number 35?

Back

35

Front

What is the formula for combining Mg²⁺ and OH⁻ ions?

Back

Mg(OH)₂

Front

Who performed the gold foil experiment?

Back

Rutherford

Front

1 mol is equal to how many particles?

Back

6.02•10²³

Front

How many neutrons are in an isotope with mass number 63 and atomic number 29?

Back

34

Front

What is the definition of an ion?

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

What is the charge of a magnesium ion (Mg)?

Back

Mg²⁺ has a charge of +2.

Front

What is the significance of Avogadro's number?

Back

Avogadro's number (6.02•10²³) is the number of particles in one mole of a substance.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the atomic number of an element?

Back

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