2.2 Subatomic Particles

Question 1

Smallest particle of an element that retains the properties of the element.

Answer 1

Atom

Question 2

Atom of an element are different from the atoms…

Answer 2

Of another element

Question 3

Subatomic particles of atoms:

Answer 3

Protons, neutrons and electrons

Question 4

At the nucleus of each atom there are..

Answer 4

Protons and neutrons, which contain the positive charge and the total mass of the element.

Question 5

Characteristics of the nucleus:

Answer 5

Occupies a very small part of the center of an atom.

Question 6

Most atom includes..

Answer 6

An empty space around the nucleus, through which electrons move.

Question 7

The electrons of an tom move around the nucleus in defines regions..

Answer 7

Called orbits

Question 8

Protons:

Answer 8

Has positive charge.

Question 9

Electron:

Answer 9

Has a negative charge and its mass is extremely small.

Question 10

Neutron:

Answer 10

Subatomic particle which has no electric charge (it is neutral). Nearly equal to the mass of a proton

Question 11

Electron symbol

Answer 11

e-

Question 12

Proton symbol

Answer 12

P+

Question 13

Neutron symbol

Answer 13

n°

Question 14

Location of the elctron

Answer 14

Around the nucleus

Question 15

Location of the proton

Answer 15

At the nucleus

Question 16

Location of the neutron

Answer 16

At the nucleus

Question 17

Relative electric charge of the electron

Answer 17

Negative (-)

Question 18

Relative electric charge of proton

Answer 18

Positive (+)

Question 19

Relative electric charge of neutron

Answer 19

0

Question 20

Relative mass of electron

Answer 20

1/1840

Question 21

Relative mass of proton

Answer 21

1

Question 22

Relative mass of neutron

Answer 22

1

Question 23

The number of protons in an atom is..

Answer 23

Unique and identifies it.

Question 24

The mass number of an atom is equal to its..

Answer 24

Total number of protons and neutrons

Question 25

Atomic number

Answer 25

Número de arriba(arriba de el elemento)

Question 26

Atomic mass

Answer 26

Número decimal

Question 27

Atoms of the same element with different number of neutrons and different masses

Answer 27

Isotopes

Question 28

The atomic weight of an element is weighted average of the masses of..

Answer 28

All isotopes of that elements found in nature.

Question 29

Atoms are..

Answer 29

Electrically neutral