Chemistry Final Review Fall 2024

Front

Positive ions form when atoms _________ valence electrons.

Back

lose

Front

Which of the following elements is a transition metal? Oxygen, Carbon, Iron, Helium.

Back

Iron

Front

In the reaction NaOH + HCl -> H2O + NaCl, which are the reactants?

Back

NaOH, HCl

Front

How many significant figures are in the number 0.00045?

Back

2

Front

Which of the following is a characteristic of nonmetals? Shiny, Good conductor of electricity, Malleable, Brittle.

Back

Brittle

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

Define a covalent bond.

Back

A chemical bond formed by the sharing of electron pairs between atoms.

Front

What is the pH scale used for?

Back

To measure the acidity or basicity of a solution.

Front

What is the law of conservation of mass?

Back

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

Front

What are isotopes?

Back

Atoms of the same element with different numbers of neutrons.