Atoms And molecules

Question 1

Chemistry

Answer 1

Study of matter

Question 2

Atom

Answer 2

Smallest piece of an element

Question 3

Elements

Answer 3

Substances Only containing One kind of atom

Question 4

Nucleus

Answer 4

Center Section of an atom made up of protons and neutrons

Question 5

Protons

Answer 5

Have positive charge

Question 6

Neutrons

Answer 6

Have no charge

Question 7

Atomic mass

Answer 7

The Sum of protons and neutrons

Question 8

Electrons

Answer 8

Negatively charged

Question 9

Shell

Answer 9

Cloud likes space surrounding the nucleus

Question 10

Atomic Number

Answer 10

The number of protons in its nucleus

Question 11

Atomic Theory

Answer 11

How scientist think how an atom looks like

Question 12

Particles accelerators

Answer 12

Machines that smash Atoms

Question 13

Chemical symbols

Answer 13

Abbreviations for the names of elements

Question 14

Periodic table of the elements

Answer 14

The Grouping of the elements in rows and columns based on their chemical and physical properties

Question 15

Periods

Answer 15

The horizontal rows of the periodic table elements in the same period have the same number of shells

Question 16

Groups

Answer 16

The vertical columns of the table all the elements in that group have the same number of electrons in their outer shells

Question 17

Molecules

Answer 17

Atoms may join with other atoms to form units that are called molecules

Question 18

Compounds

Answer 18

Usually the chemical change produces molecules known as compounds

Question 19

Niels Bohr

Answer 19

Known for research on atomic structure and atomic bombs

Question 20

Dimitri

Answer 20

developing the periodic table of elements

Question 21

Ernest Rutherford

Answer 21

Research in atomic physics and radioactivity