Chemistry - Fall 2024 Final Exam

Front

If the number of protons and electrons do not match, the atom is ____.

Back

ionic.

Front

How many neutrons does calcium have?

Back

20.

Front

What type of reaction is represented by the equation 2Pb(NO3)2 --> 2PbO + 4NO2 + O2?

Back

Decomposition.

Front

How many Hydrogen atoms are in 4H2O?

Back

8.

Front

What is the Bohr model?

Back

A model of the atom that depicts electrons orbiting the nucleus in defined paths.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is a covalent bond?

Back

A chemical bond formed by the sharing of electrons between atoms.

Front

What is the difference between an ionic bond and a covalent bond?

Back

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

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed.

Front

What is a mole in chemistry?

Back

A mole is a unit that measures the amount of a substance, equal to 6.022 x 10^23 particles.