Almost Halfway Review Freshmen Science

Front

A solution with a pH of 7 is considered to be ______.

Back

Neutral

Front

Monosaccharides are monomers of ______.

Back

Carbohydrates

Front

In an ionic bond, valence electrons are ______.

Back

given and taken

Front

What is the atomic number?

Back

The number of protons in an atom.

Front

Where are the nonmetals located on the periodic table?

Back

Top right corner.

Front

What is a covalent bond?

Back

A bond formed when two atoms share one or more pairs of electrons.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the role of enzymes in biological reactions?

Back

Enzymes act as catalysts to speed up chemical reactions in the body.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What are the three states of matter?

Back

Solid, liquid, and gas.