S8P1 Review

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that in a closed system, the mass of reactants equals the mass of products. This means that matter cannot be created or destroyed in a chemical reaction.

Tags

NGSS.MS-PS1-5

Front

What is a valence electron?

Back

A valence electron is an electron that is found in the outermost shell of an atom and can participate in forming chemical bonds.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Front

What are heterogeneous mixtures?

Back

Heterogeneous mixtures are mixtures that do not have a uniform composition throughout. The different components can usually be seen and separated.

Front

What is the charge of a neutron?

Back

A neutron has no charge; it is neutral.

Front

How do you calculate the total mass of products in a chemical reaction?

Back

To calculate the total mass of products, add the masses of all reactants together. In a closed system, this total mass will equal the mass of the products.

Tags

NGSS.MS-PS1-5

Front

What is the difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances, while a compound is a substance formed when two or more elements chemically bond together.

Front

What is the significance of group 1 elements in the periodic table?

Back

Group 1 elements, also known as alkali metals, all have one valence electron, making them highly reactive, especially with water.

Front

What is a precipitate?

Back

A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the formula for calculating the mass of a compound formed from its elements?

Back

The mass of a compound formed is equal to the sum of the masses of the individual elements that make it up.

Tags

NGSS.MS-PS1-5

Front

What are the three main subatomic particles?

Back

The three main subatomic particles are protons (positive charge), neutrons (no charge), and electrons (negative charge).