Chemistry Semester Exam 2024

Front

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

Back

the atoms have more protons.

Front

How many neutrons does calcium have?

Back

20

Front

Electronegativity is...

Back

how good an atom is at attracting electrons.

Front

What type of reaction is illustrated by 2HI --> H2 + I2?

Back

decomposition.

Front

Rank these in order from least dense to most dense: Gas, Liquid, Solid.

Back

Gas, Liquid, Solid.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

Define an ion.

Back

An atom or molecule that has a net electric charge due to the loss or gain of one or more electrons.

Front

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

Back

An ionic bond is formed by the transfer of electrons, while a covalent bond is formed by the sharing of electrons.

Front

What is the pH scale?

Back

A scale used to measure the acidity or basicity of a solution, ranging from 0 (acidic) to 14 (basic).

Front

What is a catalyst?

Back

A substance that increases the rate of a chemical reaction without being consumed in the process.