atoms

Question 1

what is the building block of matter

Answer 1

atom

Question 2

wh first hypothezised the concept of the atom

Answer 2

democritus

Question 3

what does “atmos” mean

Answer 3

invisible

Question 4

who was the English gas chemist who studied the nature of gasses

Answer 4

John Dalton from the 19th century

Question 5

what are the five principles of the atomic theory

Answer 5

1. elements are made up of tiny particles called atoms
2. atoms cannot be created, divided into smaller particles, nor destroyed in a chemical reaction
3. a chemical reaction only changes the grouping of atoms
   4.atoms of one element can combine with atoms of other elements to form compounds
4. the atoms of one element are different from those of another element
5. elements can be identified by their atomic number and atomic weight

Question 6

what is the atomic number

Answer 6

the number of protons in an atom of an element

Question 7

what is the atomic mass

Answer 7

the number of the protons and neutrons combines

Question 8

is an electron considered to have mass

Answer 8

nope

Question 9

where are protons and neutrons found

Answer 9

in the nucleus

Question 10

what charge does a proton carry

Answer 10

positive

Question 11

what charge does an electron carry

Answer 11

negative

Question 12

what charge does a neutron carry

Answer 12

it do be nuetraling

Question 13

who was niel bohr

Answer 13

a danish scientist that suggested electrons travel in an orbit-like pattern around the nucleus

Question 14

what do electrons travel in

Answer 14

shelfs, or energy levels around the nucleus

Question 15

how many electrons does the shelf nearest the nucleus have

Answer 15

usually two

Question 16

how many electrons does the shelf next to the shelf nearest the nucleus have

Answer 16

up to 8

Question 17

what law states that opposites attract and same poles repel

Answer 17

the law of magnetic poles

Question 18

where are electrons usually found

Answer 18

near the nucleus