Question

label the parts of an atom on the diagram below.

1. what type of charge does a proton have?
2. what type of charge does a neutron have?
3. what type of charge does an electron have?
4. which two subatomic particles are located in the nucleus of an atom?
5. if an atom has 35 protons in the nucleus, how many electrons will it have orbiting the nucleus?
6. what is the atomic number of the atom in the diagram above?
7. what is the atomic mass/mass number of the atom in the diagram above?
8. how many protons are in the nucleus of an atom with an atomic number of 15?
9. how many electrons are in the nucleus of an atom with an atomic number of 20?
10. how many neutrons are in the nucleus of an atom with an atomic number of 25? (use periodic table for mass)
11. what is the mass number of an atom with 3 protons, 4 neutrons, and 3 electrons?
12. how many neutrons are in the nucleus of an atom that has an atomic mass of 36 and an atomic number of 25?

Explanation:

Step1: Recall atomic - structure knowledge

An atom has a nucleus with protons and neutrons, and electrons orbit the nucleus. Protons have a positive charge, neutrons are neutral, and electrons have a negative charge. In a neutral atom, the number of protons equals the number of electrons. The atomic number is the number of protons, and the mass number is the sum of protons and neutrons.

Step2: Answer question 4

Protons have a positive charge.

Step3: Answer question 5

Neutrons have a neutral charge.

Step4: Answer question 6

Electrons have a negative charge.

Step5: Answer question 7

Protons and neutrons are located in the nucleus.

Step6: Answer question 8

In a neutral atom, the number of electrons equals the number of protons. So if there are 35 protons, there are 35 electrons.

Step7: Answer question 9

Count the number of protons in the nucleus of the diagram to get the atomic number. Assume there are 6 protons, so the atomic number is 6.

Step8: Answer question 10

The mass number is the sum of protons and neutrons. Assume there are 6 protons and 6 neutrons, so the mass number is 6 + 6=12.

Step9: Answer question 11

The atomic number is equal to the number of protons. So an atom with an atomic number of 15 has 15 protons.

Step10: Answer question 12

Electrons are outside the nucleus. So the number of electrons in the nucleus of an atom (any atom) is 0.

Step11: Answer question 13

For an atom with atomic number 25 (manganese), from the periodic - table, the mass number is approximately 55. Neutrons = Mass number - Atomic number. So neutrons = 55 - 25 = 30.

Step12: Answer question 14

Mass number = Protons+Neutrons. Given 3 protons and 4 neutrons, the mass number is 3 + 4 = 7.

Step13: Answer question 15

Neutrons = Atomic mass - Atomic number. Given atomic mass = 36 and atomic number = 25, neutrons = 36 - 25 = 11.

Answer:

1. Positive charge
2. Neutral charge
3. Negative charge
4. Protons and neutrons
5. 35
6. 6 (assuming 6 protons in the diagram)
7. 12 (assuming 6 protons and 6 neutrons in the diagram)
8. 15
9. 0
10. 30
11. 7
12. 11