unit 1 chemistry

Question 1

Element

Answer 1

118 (92) different types of matter that make up everything

Question 2

Atom

Answer 2

The tiniest piece of an element that exists

Question 3

Compound

Answer 3

Two or more elements that are attached to each other

Question 4

Molecule

Answer 4

The smallest unit of the compound

Question 5

Mixture

Answer 5

Two or more compounds or elements mixed together

Question 6

Periodic Table

Answer 6

A chart that contains symbols, names and other information about the elements

Question 7

Proton

Answer 7

Positively charged particle that resides in the nucleus of the atom

Question 8

Neutron

Answer 8

Uncharged particle that resides in the nucleus of the atom

Question 9

Electron

Answer 9

Negatively charged particle that resides on the outer portion of the atom

Question 10

Charge

Answer 10

A property of matter that causes it to be repelled or attracted

Question 11

Chemical Bond

Answer 11

A means by which atoms stick together

Question 12

Matter

Answer 12

Anything that has mass and takes up space

Question 13

Energy

Answer 13

A quantity which allows objects to do work

Question 14

Ion

Answer 14

An atom that has either lost or gained outermost electrons and is therefore charged

Question 15

Isotopes

Answer 15

Atoms of the same element that differ only in the number of neutrons

Question 16

Atomic number

Answer 16

Number of protons or electrons

Question 17

Mass number

Answer 17

Total number of protons and neutrons

Question 18

Valence electrons

Answer 18

Outershell electrons

Question 19

Period

Answer 19

Horizontal row of the periodic table

Question 20

Group (family)

Answer 20

Vertical column of the periodic table

Question 21

Ionic bond

Answer 21

Bond formed by attraction of two oppositely charged ions

Question 22

Covalent Bonds

Answer 22

A bond formed by a pair of valence electrons

Question 23

Octet rule

Answer 23

Atoms tend to fill their outershell electrons

Question 24

Metal

Answer 24

Elements on the left side of the table that are good conductors, shiny, malleable, and tend to form positive ions by losing electrons

Question 25

Non metal

Answer 25

Elements on the right side of the table that are dull, brittle, poor conductors, and tend to form negative ions by gaining electrons

Question 26

Metalloid

Answer 26

Elements that have characteristics of both metals and nonmetals

Question 27

Transition Metal

Answer 27

Elements in groups 3-12

Question 28

Chemical Equation

Answer 28

Slows reactant and products

Question 29

Coefficient

Answer 29

Used to balance each element

Question 30

Excited electron

Answer 30

Electron that has gained energy and moved to a higher energy state farther from the nucleus

Question 31

Ground state electron

Answer 31

Electron in its lowest possible energy level

Question 32

Bright line spectrum

Answer 32

Specific colors of light given off by electrons as they move back down from excited state to ground state. This helps us identify elements.

Question 33

Polyatomic ions

Answer 33

Clump of two or more atoms, covalently bound, with an overall charge, that behave as a single ion

Question 34

Molecular formula

Answer 34

Symbols for elements and subscripts that show the number and type of atoms in a molecule or compound

Question 35

Mole

Answer 35

6.02 x 10²³

Question 36

Polar molecule

Answer 36

Molecule that has a negative and positive side

Question 37

Polar bond

Answer 37

When 2 atoms share electrons unequally

Question 38

Noble Gas family

Answer 38

column 18

Question 39

Alkali metal family

Answer 39

column 1

Question 40

Halogen Family

Answer 40

column 17