Mid-Term Chem Exam. Bondx, Reactions, Matter and Stoichiometry

Front

What is the atomic number?

Back

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

Front

What is the atomic number of Barium (Ba)?

Back

The atomic number of Barium (Ba) is 56.

Front

What is the electronic configuration of Calcium (Ca)?

Back

The electronic configuration of Calcium (Ca) is 2,8,8,2.

Front

What must an atom have to be neutral if it has 12 positively charged subatomic particles?

Back

It must have 12 electrons.

Front

What is a mole in chemistry?

Back

A mole is a unit that measures the amount of substance, defined as containing exactly 6.022 x 10^23 particles.

Front

What is the total number of moles of H2O produced from 4NH3 + 5O2 -> 4NO + 6H2O when 12 moles of NH3 are consumed?

Back

18 moles of H2O are produced.

Front

What are protons?

Back

Protons are positively charged subatomic particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutrons are neutral subatomic particles found in the nucleus of an atom.

Front

What are electrons?

Back

Electrons are negatively charged subatomic particles that orbit the nucleus of an atom.

Front

What is stoichiometry?

Back

Stoichiometry is the calculation of reactants and products in chemical reactions.