Science, Atoms, Elements, Periodic Table

Question 1

nucleus

Answer 1

most of the mass of an atom is in the nucleus; the central core of an atom which contains protons and neutrons

Question 2

neutron

Answer 2

a small particle in the nucleus of an atom; it has no electrical charge; it is neutral

Question 3

proton

Answer 3

small, positively charged particles in the nucleus of an atom

Question 4

electron

Answer 4

a tiny, negatively charged particle that moves around the outside of the nucleus of an atom; they move in the electron cloud

Question 5

periodic table

Answer 5

an arrangement of the elements showing the repeating pattern of their properties

Question 6

period

Answer 6

a horizontal row (across) of elements in the periodic table

Question 7

group or family

Answer 7

elements in the same vertical (up and down) column of the periodic table

Question 8

What four things are found for each element on the periodic table?

Answer 8

1) the atomic number; 2) the chemical symbol; 3) the name of the element; 4) the atomic mass

Question 9

element

Answer 9

a pure substance that cannot be broken down into any other substance

Question 10

molecule

Answer 10

a group of two or more atoms held together by chemical bonds

Question 11

atom

Answer 11

the smallest particle of an element that can still be considered an element

Question 12

Dalton’s atomic theory

Answer 12

John Dalton said that * all elements consist of atoms that cannot be divided * all atoms of an element are exactly alike * an atom of one element cannot be changed into an atom of a different element * compounds are formed when atoms of two or more elements combine together

Question 13

You should be able to draw an atom

Answer 13

(draw)

Question 14

You should be able to identify the parts of an atom

Answer 14

(identify)

Question 15

You should be able to identify information of elements on the periodic table

Answer 15

(identify)

Question 16

You should be able to balance chemical equations using coefficients

Answer 16

(chemical equation)

Question 17

energy level

Answer 17

the specific amount of energy an electron has

Question 18

atomic number

Answer 18

the number of protons in the nucleus of an atom

Question 19

isotopes

Answer 19

atoms with the same number of protons but with different numbers of neutrons

Question 20

atomic mass or mass number

Answer 20

the average number of protons and neutrons in an atoms

Question 21

Mendeleev

Answer 21

he created the first version of the periodic table

Question 22

chemical symbol

Answer 22

one or two letters that identify an element

Question 23

metals

Answer 23

Elements that are good conductors of electric current and heat. They are shiny and bendable. They can be hammered into shapes and stretched into thin wire. They are on the left of the periodic table.

Question 23

Nonmetals

Answer 23

An element that lacks most of the properties of metals. They are poor conductors of electricity and heat. They are dull and brittle. Many are gasses at room temperature. They are on the right of the periodic table.

Question 24

Metalloids

Answer 24

Metal loads have some properties of metals and some properties of non metals. They are in the middle of the periodic table.