Chemistry Midterm Review

Front

What experiment was responsible for discovering the electrons, a negatively charged particle?

Back

Cathode-Ray Tube Experiment

Front

Elements in Group 17 of the periodic table are known as:

Back

Halogens

Front

Which of the following best describes an exothermic reaction?

Back

It releases heat to the surroundings.

Front

How many valence electrons does nitrogen (N) have?

Back

5

Front

Which element has the highest electronegativity?

Back

Fluorine (F)

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 electrons between atoms.

Front

What is the pH scale used for?

Back

To measure the acidity or basicity of a solution.

Front

What is the principle 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.