Chapter 2.3 The modern view of the atomic structure

Question 1

3 subatomic particles are

Answer 1

1. neutrons(o) protons (+1) and electrons (-1)

Every atom has #protons = # electrons so they have no net charge

Question 2

ATOMIC MASS UNIT 1 amu=

Answer 2

1.66054 x10^-24

Question 3

PROTON amu

Answer 3

1.0073 amu

Question 4

NEUTRON amu

Answer 4

1.0087 amu

Question 5

ELECTRON amu

Answer 5

5.486 x10 -4 amu

Question 6

1 proton/ 1 neutron = ? electrons

neutrons and protons have almost the same mass

Answer 6

1836 electrons

Question 7

Angstrom

Answer 7

1A = 1x10 -10 m

Question 8

ATOMIC NUMBER

Answer 8

is the number of PROTONS

Question 9

ISOTOPES

Answer 9

Atoms with identical atomic numbers but different mass numbers ( same number of protons and different number of neutrons) are called ISOTOPES of one another