Question

Protons, Neutrons, Electrons

1) how many protons neutrons and electrons are there in sulfur.

2) How many protons neutrons and electrons are there in magnesium

3) How many protons are there in the nitrogen ion (N-3)

4) How many protons neutrons and electrons are there in the chlorine ion (Cl-)

5) What is the atomic number of a neutral Atom with 35 electrons? what element is

this?

6) True or false: an element with 35 protons and 38 electrons is a neutral element.

7) How many electrons does oxygen have?

8) What is the atomic number of an element with 26 protons?

9) What is the mass number of an element with 35 protons 38 neutrons and 35 electrons?

10)If an element has three different forms each with different neutrons what is this

called? Is it an isomer, an isotope an isotherm or an iso-flex?

Answer 1

1)

Sulfur chemical formula = S

number of protons = 16

number of neutrons = 32 - 16 = 16

number of electrons = 16

2)

number of protons = 12

number of neutrons = 24 - 16 = 12

number of electrons = 12

3)

number of protons = 7

number of neutrons = 14 - 7 = 7

number of electrons = 4

4)

number of protons = 17

number of neutrons = 35 - 17 = 18

number of electrons = 18

5)

atomic number = 35

element is Bromine (Br)

6) False.

7) number of electrons = 8

8) atomic number = 26

9) mass number = protons + neutrons = 35 + 38 = 73

10) isotope