9th Grade Semester 1 Review

Front

What is the proper chemical formula for combining Al³⁺ and Cl⁻?

Back

AlCl₃

Front

What happens to the kinetic energy of particles when the temperature of a sample increases?

Back

It increases

Front

What type of bond involves the sharing of electrons between atoms?

Back

Covalent

Front

How many protons does Potassium (K) have?

Back

19

Front

Which element has properties similar to Calcium (Ca)?

Back

Magnesium

Front

What is the definition of an ionic bond?

Back

An ionic bond is a chemical bond formed between two ions with opposite charges.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

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 law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.