Chemistry Core A - Products From Rocks: Atoms And Elements

Question 0

Where is the nucleus of an atom found?

Answer 0

The nucleus made up of protons and neutrons is found at the center of the atom, surrounded by the electron shell.

Question 1

What are the two main features of an atom?

Answer 1

The nucleus made up of protons and neutrons in the center, and the shell made up of electrons surrounding the nucleus.

Question 2

What does the nucleus of an atom contain?

Answer 2

The nucleus of an atom contains positively charged protons and neutron which have no charge.

Question 3

What is the charge of a proton?

Answer 3

The charge of a proton is positive +1.

Question 4

What is the charge of a neutron?

Answer 4

A neutron doesn’t have a negative or positive charge, so is neutral.

Question 5

What is the overall charge of the nucleus of an atom?

Answer 5

The overall charge of the nucleus of an atom is positive because of the protons.

Question 6

Do the electrons in the shell of an atom move around the nucleus of stay in a fixed position?

Answer 6

The electrons in the outer shell of an atom move around the nucleus.

Question 7

What is the charge of an electron?

Answer 7

The charge of an electron is negative -1.

Question 8

What feature of the atom do electrons occupy?

Answer 8

The electrons occupy the shell of an atom.

Question 9

What feature of an atom is responsible for all chemical reactions?

Answer 9

The outer electron shell of an atom is responsible for all chemical reactions.

Question 10

What in an atom equals the number of electrons?

Answer 10

The number of protons in an atom equal the number of electrons.

Question 11

What is the overall charge of an atom?

Answer 11

The overall charge or an atom is neutral 0. This is because the equal number of positively charged protons and negatively charged electrons cancel one another out.

Question 12

What are the similar and different features shared between protons and electrons?

Answer 12

Protons and electrons have equal and opposite charges.

Question 13

What is the mass of a proton?

Answer 13

A proton has a mass of 1.

Question 14

What is the mass of a neutron?

Answer 14

A neutron has a mass of 1.

Question 15

What is the mass of an electron?

Answer 15

The mass of an electron is really 1/2000; however, it is so small that it is usually disregarded as 0.

Question 16

If electrons are added or removed from the shell of an atom, what does it become?

Answer 16

If electrons are added or removed from the shell of an atom, the atom becomes an ion.

Question 17

What is the definition of an element?

Answer 17

An element consists of only one type of atom.

Question 18

What is the definition of an atom?

Answer 18

An atom is the simplest form of an element.

Question 19

What feature of an atom determines what element is is?

Answer 19

The atomic number of an atom; which is the number of protons in the nucleus of the atom, determines which element the atom is.

Question 20

If a substance contains only one type of atom, what is it called?

Answer 20

If a substance contains only one type of atom then it is called an element.

Question 21

How many elements are there?

Answer 21

There are about 100 different elements.

Question 22

What will all of the atoms of a particular element have in common?

Answer 22

All the atoms of a particular element will contain exactly the same number of protons in their nuclei.

Question 23

What will be the difference between all elements be?

Answer 23

All different element will have a different number of protons in their nuclei.