Chemistry Quiz

Molecule

• a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance.

• the basic unit of a chemical element.

• A group of compounds that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance.

Tags

NGSS.MS-PS1-1

Compound

• is a substance made up of two or more different chemical elements combined in a fixed ratio.

• 1. a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

• A basic part of an atom's cell

Tags

NGSS.MS-PS1-1

Pure Substance

• 1. a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

• One atom that shows the biggest fundamental unit of a chemical compound that can take part in a chemical reaction

Tags

NGSS.MS-PS1-1

Period

• The Number on the Horizontal row of the Periodic Table of the elements

• The number on the Vertical row of the Periodic Table of the Elements

What are valence electrons

• The doubled of the amount of electrons there is in the atom

• Electrons on the last shell of the Bohr model.

  Also the amount of valence electrons depends on Period

• Electrons on the last shell of the Bohr model.

  Also the amount of valence electrons depends on Group Number

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Atom

• The basic unit of a chemical element

• A very small particle in everything everywhere.

Tags

NGSS.MS-PS1-1

Subscript

• Subscripts are numbers that come after a symbol and below.

• Subscripts are numbers that come before a symbol and above

• Subscripts tell you the number of. atoms of that element.

• Subscripts tell you number of molecules in that element

Coefficient

• The larger number in front of the element's symbol

• The smaller number behind the element's symbol

• The larger number behind the element's symbol

• The smaller number in front the element's symbol

What is the difference of Molecules and Compounds

• A molecule is a group of two or more atoms held together by chemical bonds. A compound is a substance which is formed by two or more different types of elements which are united chemically in a fixed proportion.

• A molecule is an atom held together by chemical bonds. A compound is a substance which is formed by two or more different types of elements which are united chemically in a fixed proportion.

• A molecule is a is a substance which is formed by two or more different types of elements which are united chemically in a fixed proportion. A compound is a is a group of two or more atoms held together by chemical bonds.

Tags

NGSS.MS-PS1-1

2Na

What is the coefficient?

• Na

• 2

• a