Chemistry Final

Front

What is evidence of a chemical reaction?

Back

Evidence of a chemical reaction includes formation of a precipitate, production of a gas, and sudden release of light. A state of matter change alone is not sufficient evidence.

Tags

NGSS.MS-PS1-2

Front

Which element is in the same group as Bromine (Br) but has fewer protons than Magnesium (Mg)?

Back

Fluorine (F) is in the same group as Bromine and has fewer protons than Magnesium.

Front

What is the relationship between protons, neutrons, and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons. The number of neutrons can vary.

Front

How do you calculate the mass of hydrogen produced in a reaction?

Back

The mass of hydrogen produced can be determined using stoichiometry based on the balanced chemical equation.

Tags

NGSS.HS-PS1-7

Front

What determines the identity of an element?

Back

The identity of an element is determined by the number of protons it has.

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 significance of the periodic table in identifying elements?

Back

The periodic table organizes elements by their atomic number and groups, helping to identify their properties and relationships.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which defines the element.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is a group of two or more atoms bonded together.

Tags

NGSS.MS-PS1-1

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5