Atoms

Question 1

What are the 5 things about nucleus (in atoms)

Answer 1

• it’s in the middle of the atom
• it contains protons and neutrons
• the nucleus has a radius of around 1x10’15m
• it has a + charge because of the protons
• almost all the mass in concentrated in the nucleus

Question 2

What is the mass and charge of a proton

Answer 2

Mass =1

Charge =+1

Question 3

What is the mass and charge of a neutron

Answer 3

Mass=1

Charge = no charge (neutral)

Question 4

What is the mass and charge of an electron

Answer 4

Mass = very small (0)

Charge =-1

Question 5

How are atoms neutral

Answer 5

They are neutral because there number of protons = to number of electrons

Question 6

What is an ion and how is it not neutral

Answer 6

An ion is an atom or groups of atoms that has lost or gained electrons

And in ions the number of protons don’t = number of electrons so this means it has an overall charge

Eg ion with -2 charge has more electrons then protons

Question 7

How does the overall charge of Atom work using protons and electrons

Answer 7

The charge of protons is =to charge of electrons so both charges cancel out each other

Question 8

How do we Calculate the atomic number of an element

Answer 8

The atomic number is =to number of protons in the element

Question 9

How do we calculate the mass number

Answer 9

Number of protons + number of neutrons =mass number

Question 10

How do find the neutrons in a element

Answer 10

Atomic number-atomic mass