Periodic Table

Question 0

Improved the periodic table and arranged the elements in order of the atomic number

Answer 0

Henry Mosley

Question 1

Arranged elements in order of atomic mass

Answer 1

Mendeleev

Question 2

Equals the same element with different number of neutrons

Answer 2

Isotopes

Question 3

Equals electrons in the outer energy level

Answer 3

Valance electrons

Question 4

Equals bonding by sharing of electrons

Answer 4

Covalent bonding

Question 5

Horizontal rows

Answer 5

Periods

Question 6

Bonding by transferring electrons

Answer 6

Ionic bonds

Question 7

Vertical columns

Answer 7

Groups

Question 8

Second to last energy level

Answer 8

Penultimate level

Question 9

Strong shiny malleable and ductile

Answer 9

Metals

Question 10

Has one valence electron and reacts with water

Answer 10

Alkali

Question 11

Hard, dense, found in the Earth’s crust, has two valence electrons

Answer 11

Alkaline earth metals

Question 12

Have one or two valence electrons

Answer 12

Transition metals

Question 13

The transition element, only one that is liquid at room temperature

Answer 13

Mercury

Question 14

Brittle, not malleable or ductile, and do not conduct heat or electricity

Answer 14

Nonmetals

Question 15

Most active of nonmetals

Answer 15

Halogens

Question 16

Unreactive and inert

Answer 16

Noble gases

Question 17

Contain properties of metals and nonmetals

Answer 17

Metalloids

Question 18

A capital letter or a combination of a capital letter and a small letter that is used to represent an element is called a

Answer 18

Chemical symbol

Question 19

An average of the masses of all the isotopes that occur in nature for an element is the

Answer 19

Average atomic mass

Question 20

Elements in the middle of the periodic table, group 4 through seven, are called the

Answer 20

Transition elements

Question 21

The number of protons in and atom is the

Answer 21

Atomic number

Question 22

Protons and neutrons are composed of

Answer 22

Quarks

Question 23

The center of an atom where protons and neutrons are located is the

Answer 23

Nucleus

Question 24

A total count of the neutrons and protons in an atom is the

Answer 24

Mass number

Question 25

Atoms of the same element but with different numbers of neutrons are

Answer 25

Isotopes

Question 26

Elements that are found on the left side of the periodic table are

Answer 26

Metals

Question 27

Elements that have some properties of both metals and nonmetals are

Answer 27

Metalloids

Question 28

The particles that move about the nucleus and have a negative charge are

Answer 28

Electrons

Question 29

The region around the nucleus occupied by electrons is a

Answer 29

Electron cloud

Question 30

A chart that shows the classification of elements is called the

Answer 30

Periodic table