2.1 Study Guide

Question 1

Where are protons located in the nucleus?

Answer 1

In the nucleus.

Question 2

What is the mass of a protons and its charge?

Answer 2

Relative mass is 1 and the charge is +1.

Question 3

What is the function of a proton?

Answer 3

Protons give charge to a nucleus, determine the atomic number of an element, and provide the attractive electrostatic central force which binds the atomic electrons.

Question 4

Define an isotope.

Answer 4

Atoms of the same element with the same number of protons but different numbers of neutrons.

Question 5

How do you determine the atomic mass, element, and ion charge of an atom based on # of protons, electrons, and neutrons?

Answer 5

The atomic mass can be calculated by adding the total number of protons and the total number of neutrons of that particular isotope. The number of protons in an atom determines what element it is. We can find the ion charge by taking the number of electrons and subtracting it from the number of protons.

Question 6

How do you determine the # of protons, electrons, and neutrons when given the element, atomic mass, and ion charge?

Answer 6

You can find the # of protons because the atomic number of the given element is the same # of protons. The number of neutrons can be calculated by subtracting the atomic number from the atomic mass. If it is a neutral atom, the number of electrons is equal to the proton number. If the ion is positively charged, the number of electrons is found by subtracting the charge number from the proton number. If the ion is negatively charged, the number of electrons is found by adding the charge number to the proton number.

Question 7

Why can isotopes be useful in scientific research?

Answer 7

Isotopes help with determining the age of something, they decay spontaneously, and give off energy and subatomic particles.

Question 8

Where are neutrons located in an atom?

Answer 8

In the nucleus

Question 9

What is a neutrons mass?

Answer 9

Relative mass of 1

Question 10

What is the charge of a neutron?

Answer 10

Relative charge is nuetral

Question 11

What is the function of a neutron?

Answer 11

The primary role of the neutrons in the nucleus of an atom is to contribute to the binding energy or nuclear glue that holds the nucleus itself together.

Question 12

Where is an electron located?

Answer 12

Around the nucleus

Question 13

What is the mass of an electron?

Answer 13

Relative mass is 0.0005

Question 14

What is the charge of electrons?

Answer 14

Relative charge is -1

Question 15

What is the function of an electron?

Answer 15

They help bond atoms together.