Atoms

Question 1

Atom

Answer 1

building block of all matter

Question 2

Element

Answer 2

Any material that is made up of only one type of atom

Question 3

Periodic table

Answer 3

a chart that lists all known elements

Question 4

Chemical Symbol

Answer 4

A shorthand notation of an element
consisting of a single capital letter, or a capital letter and
one or two small (lower case) letters

Question 5

Chemical Formula

Answer 5

A shorthand method representing the
composition of a compound through the use of chemical
symbols and subscripts

Question 6

Nucleus

Answer 6

• center of an atom

Question 7

What is the Nucleus made of

Answer 7

protons and neutrons

Question 8

Protons

Answer 8

– positively charged, located in nucleus

Question 9

Neutrons

Answer 9

– neutral charge, located in nucleus

Question 10

Electrons

Answer 10

– negatively charged, located orbiting
around nucleus

Question 11

Atomic number =

Answer 11

the number of protons
contained in the atomic nucleus

Question 12

Mass Number

Answer 12

= total # of protons and neutrons an
atom contains

Question 13

Isotopes:

Answer 13

Atoms of the same element but different
number of neutrons

Question 14

Atomic Mass:

Answer 14

the total mass of an atom

Question 15

A period is

Answer 15

a horizontal row (7
periods)

Question 16

A group is

Answer 16

a vertical column (18
groups)

Question 17

Metals:

Answer 17

shiny, opaque, good conductors, malleable, ductile, and solid

Question 18

Nonmetals:

Answer 18

poor conductors, transparent, solid
nonmetals are neither malleable nor ductile, brittle, and shatter when hammered

Question 19

Metalloids

Answer 19

6 of them: B, Si, Ge, As, Sn, Sb, Weak conductors of electricity

Question 20

John Newlands-

Answer 20

“Law of Octave”. Every 1st and 8th elements and 2nd and 9th
elements have similar properties.

Question 21

Lothar Meyer-

Answer 21

connection between atomic mass and elemental properties

Question 22

Dmitri Mendeleev-

Answer 22

organized elements into first periodic table.

Question 23

Henry Moseley-

Answer 23

“Periodic Law”- elements are arranged by increasing atomic
number.

Question 24

Glen Seaborg-

Answer 24

organized the periodic table by creating the Lanthanide and
Actinide series.