lesson 1

Question 1

branch of science which deals with the study of matter and energy

Answer 1

physics

Question 2

energy emitted and transferred through matter or space in the form of waves

Answer 2

radiation

Question 3

science which deals with the study of the interaction of radiation with matter

Answer 3

radiation physics

Question 4

smallest particle of the element

Answer 4

atom

Question 5

center of atom

Answer 5

nucleus

Question 6

negatively charged particle

Answer 6

electron

Question 7

rest mass of electron

Answer 7

9.1 x 10-31 kg

Question 8

positively charged particle

Answer 8

proton

Question 9

rest mass of proton

Answer 9

1.673 x 10-27 kg

Question 10

no charge

Answer 10

neutron

Question 11

mass of neutron

Answer 11

1.675 x 10-27 kg

Question 12

imaginary pathway to which electron travels

Answer 12

orbital shell

Question 13

all matter is composed of extremely small particles called atom

Answer 13

daltons model

Question 14

electron were embedded in a uniform sphere of positive charge like blueberries stuck into a muffin. the positive matter was thought to be jelly-like or a thick soup

Answer 14

j.j Thompson model

Question 15

the nuclear model of the atom consists of a small and dense positively charged interior surrounded by a cloud of electrons

Answer 15

rutherfords model

Question 16

electrons orbit the nuclear in orbits that have a set size and energy

Answer 16

bohrs model

Question 17

is assumes that the electron is a wave and tries to describe the regions in space, or orbitals, where electrons are most likely to be found

Answer 17

Schrodinger’s model

Question 18

A

Answer 18

atomic mass no. 40

Question 19

X

Answer 19

atom of element Ca

Question 20

Z

Answer 20

atomic no.(p) 20

Question 21

number of electron (7)

Answer 21

2, 8, 18, 32, 50, 72, 98

Question 22

no outer shell can contain more than?

Answer 22

8 electrons