Unit 1 and 2

Question 1

Matter

Answer 1

Anything that has volume and mass

Question 2

Atom

Answer 2

The smallest unit of an element that has all of the properties of that element containing a nucleus within an electron cloud

Question 3

Nucleus

Answer 3

The tiny, very dense, positively charged region in the center of an atom; made up of protons and neutrons

Question 4

Electron Cloud

Answer 4

All of the area inside an atom surrounding the nucleus where electrons are found

Question 5

Electrical Charge

Answer 5

A form of charge, designated negative, positive, or neutral (without charge) that is found on the subatomic particles that make up all atoms

Question 6

Protons

Answer 6

A positively charged subatomic particle of the nucleus of an atom and contributes to the mass of the atom

Question 7

Neutrons

Answer 7

A subatomic particle of the nucleus of an atom that is without charge and contributes to the mass of an atom

Question 8

Electrons

Answer 8

A negatively charged subatomic particle of the electron cloud; involved in the formation of chemical bonds

Question 9

Subatomic Particles

Answer 9

Particles that are smaller than the atom

Question 10

Chemical Formula

Answer 10

A shorthand notation that uses chemical symbols and numbers as subscripts to represent the type of atoms and number of atoms that are present in the smallest unit of the substance

Question 11

Balanced Equation

Answer 11

A symbolic representation of a chemical reaction in which both sides of the equation contain equivalent numbers of atoms of each element. The mass and the charge must be balanced on both sides of the reaction.

Question 12

Atomic Mass

Answer 12

The average mass of protons and neutrons in an element

Question 13

Nuclear Model of the Atom

Answer 13

Aconceptualmodeloftheatominwhichasmall positivelychargednucleusissurroundedby planetaryelectrons

Question 14

Scientific Notation

Answer 14

A method of expressing numbers in terms of a decimal number between 1 and 10 multiplied by a power of 10. The scientific notation for 10,492, for example, is 1.0492 × 104.

Question 15

Amu units

Answer 15

Amu stands for atomic mass unitand is used to indicatemasson an atomic or molecular scale

Question 16

Atomic Number

Answer 16

The number of protons in the nucleus of one atom of the element

Question 17

Valence Electrons

Answer 17

The electrons in the outermost energy level of an atom that influence how an element will react with other substances

Question 18

Energy Level

Answer 18

Regions around the nucleus of an atom where electrons may be found

Question 19

Net Charge

Answer 19

The sum of negative and positive charges

Question 20

Ions

Answer 20

Form as a result of the loss or gain of electrons; indentified by the overall net charge

Question 21

Property

Answer 21

The physical and chemical characteristics of a substance or element

Question 22

Reactivity

Answer 22

Rate at which a chemical substance tends to undergo a chemical reaction and significantly influenced by valence electrons

Question 23

Outermost Electron Cloud

Answer 23

The partially-filled outermost shell (or shells) determine the chemical properties of the atom; it is called the valence shell

Question 24

Metals

Answer 24

Most elements are metals, typically solid, shiny malleable, and a good conductor of heat and electricity

Question 25

Non-metals

Answer 25

Elements typically not shiny, usually a gas or brittle solid, not malleable, and a poor conductor of heat and electricity