Photons

Question 1

What is a proton?

Answer 1

A proton is a positively charged subatomic particle found in the nucleus of an atom.

Question 2

True or False: Protons have a negative charge.

Answer 2

False

Question 3

What is the charge of a proton?

Answer 3

The charge of a proton is +1.

Question 4

Fill in the blank: The number of protons in an atom determines its ______.

Answer 4

atomic number

Question 5

What is an atom?

Answer 5

An atom is the smallest unit of matter that retains the properties of an element.

Question 6

Which subatomic particle has no charge?

Answer 6

Neutron

Question 7

What is the relationship between protons and neutrons in an atom?

Answer 7

Protons and neutrons are both found in the nucleus of an atom and together make up the atomic mass.

Question 8

How many protons are in a carbon atom?

Answer 8

6 protons

Question 9

What is a molecule?

Answer 9

A molecule is a group of two or more atoms bonded together.

Question 10

True or False: A molecule can consist of atoms from different elements.

Answer 10

True

Question 11

What is the formula for calculating the number of neutrons in an atom?

Answer 11

Number of neutrons = Atomic mass - Atomic number

Question 12

Multiple Choice: Which of the following particles is found in the nucleus of an atom? (A) Electron (B) Proton (C) Photon (D) Neutron

Answer 12

B) Proton

Question 13

What is the atomic number of oxygen?

Answer 13

8

Question 14

Fill in the blank: The ______ is the central part of an atom that contains protons and neutrons.

Answer 14

nucleus

Question 15

What is an ion?

Answer 15

An ion is an atom or molecule that has gained or lost one or more electrons, resulting in a net charge.

Question 16

True or False: Electrons are heavier than protons.

Answer 16

False

Question 17

How do you determine the mass number of an atom?

Answer 17

The mass number is the sum of the number of protons and neutrons in the nucleus.

Question 18

What is the charge of an electron?

Answer 18

The charge of an electron is -1.

Question 19

Multiple Choice: Which particle orbits the nucleus of an atom? (A) Proton (B) Neutron (C) Electron (D) Positron

Answer 19

C) Electron

Question 20

What is the primary difference between an element and a compound?

Answer 20

An element is a pure substance made of only one type of atom, while a compound consists of two or more different types of atoms chemically bonded together.

Question 21

Fill in the blank: The ______ of an element is a unique identifier based on the number of protons it contains.

Answer 21

atomic number

Question 22

What is a covalent bond?

Answer 22

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.

Question 23

True or False: Protons are found outside the nucleus of an atom.

Answer 23

False

Question 24

What is the significance of the periodic table?

Answer 24

The periodic table organizes elements based on their atomic number and properties, allowing for the prediction of chemical behavior.

Question 25

If an atom has 11 protons and 12 neutrons, what is its mass number?

Answer 25

23

Question 26

What is an isotope?

Answer 26

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Question 27

Multiple Choice: Which of the following is NOT a subatomic particle? (A) Proton (B) Neutron (C) Isotope (D) Electron

Answer 27

C) Isotope

Question 28

Fill in the blank: The ______ is a measure of the average mass of atoms of an element, taking into account the relative abundance of its isotopes.

Answer 28

atomic weight

Question 29

What is the term for the outermost electrons of an atom?

Answer 29

Valence electrons

Question 30

True or False: The atomic mass of an element is always a whole number.

Answer 30

False

Question 31

If a neutral atom has 15 protons, how many electrons does it have?

Answer 31

15 electrons

Question 32

What is the primary force that holds protons and neutrons together in the nucleus?

Answer 32

Strong nuclear force

Question 33

Multiple Choice: Which element has the chemical symbol 'Na'? (A) Nitrogen (B) Sodium (C) Neon (D) Nickel

Answer 33

B) Sodium