8.5A Atomic Structure Reteach

8.5A Atomic Structure Reteach

by Frances Brewer

​Subatomic Particles

• ​Atoms are made of 3 substomic particles

  • ​protons

  • ​neutrons

  • ​electrons

• ​Protons and Neutrons are in the nucleus (center) and electrons are outside the nucleus in the electron cloud

​Subatomic Particles

• ​Each particle has a specific electric charge

• ​Protons-- Positive (charge = +1)

• ​Neutrons-- Neutral (charge = 0)

• ​Electrons-- Negative (charge = -1)

​Subatomic Particles

• ​Protons and neutrons are together in the dense center region called the nucleus

• ​Electrons are never in the nucleus. They orbit around the nucleus in a region known as the electron cloud.

Multiple Choice

What is the charge of a proton?

• Negative

• Positive

• Neutral

Multiple Choice

What is the charge of a neutron?

• Negative

• Positive

• Neutral

Multiple Choice

Which subatomic particles are found in the nucleus of an atom?

• Protons and Electrons

• Protons and Neutrons

• Neutrons and Electrons

• Protons, Neutrons and Electrons

Multiple Choice

What best describes the nucleus?

• Located in the center of the atom, holds the atom's mass, and is positively charged.

• Located in the center of the atom, does not hold the atom's mass and is negatively charged

• Located in the center of the atom, holds the atom's mass, and has no charge

• Located in the center of the atom, does not hold the atom's mass, and is positively charged.

Multiple Choice

What best describes a neutron?

• It is located outside of the nucleus and has a negative charge

• It is located inside of the nucleus and has a positive charge

• It is located outside the nucleus and has no charge

• It is located inside the nucleus and has no charge

Multiple Choice

What best describes a proton?

• It is located outside the nucleus and has a positive charge.

• It is located inside the nucleus and has a positive charge.

• It is located inside the nucleus and has no mass

• It is located inside the nucleus and has no charge.

Multiple Choice

What best describes an electron?

• It is located outside of the nucleus and has a negative charge

• It is located outside of the nucleus and has no charge

• It is located inside the nucleus and has a mass

• It is located inside of the nucleus and has no mass

Multiple Choice

Which subatomic particle has a negative charge?

• proton

• neutron

• electron

• all of the above

Multiple Choice

What best describes a proton?

• It is located outside the nucleus and has a positive charge.

• It is located inside the nucleus and has a positive charge.

• It is located inside the nucleus and has no mass

• It is located inside the nucleus and has no charge.

Multiple Choice

For a given element, the atomic number indicates the number of _____

• protons in the nucleus
• neutron in the nucleus
• electrons in the atom
• nucleons in the atom

Multiple Choice

Which subatomic particle has a negative charge?

• proton

• neutron

• electron

• all of the above

Multiple Choice

How many electrons does this atom have?

• 2

• 4

• 6

• 10

Elements on the Periodic Table

• ​Every element has its own entry on the periodic table that tells the element's name, symbol, atomic number and atomic mass

Multiple Choice

What does the 6 represent?

• Atomic mass

• atomic number

• chemical symbol

• element name

Multiple Choice

What is the atomic mass of barium

• 56

• 82

• 137

• 138

Atomic Number

• The number of Protons in an atom identify what element it is

• ​The number of protons is known as the atomic number

• ​Every element has a unique atomic number

• ​For example, Carbon has 6 protons in its nucleus so it's atomic number is 6

Multiple Choice

What is the atomic number?

• the number of protons in the nucleus

• the number of protons and neutrons in the nucleus

• the number of neutrons in the nucleus

• the number of protons in the energy levels

Multiple Choice

What particle number is equal to the atomic number ?

• Protons

• Electrons

• Neutrons

Multiple Choice

What is the atomic number of this atom?

• 1

• 3

• 4

• 7

Multiple Choice

Carbon has how many protons?

• 12

• 6

• 7

• 4

Multiple Choice

What is the atomic number of this atom?

• 8

• 16

• 24

• none of the above

Multiple Choice

How many protons are in Gold

• 79

• 197

• 118

• 276

Multiple Choice

The atomic number of an element that has 9 protons, 9 electrons, and 10 neutrons is _____.

• 9

• 10

• 19

• 28

Multiple Choice

What is the atomic number of this atom?

• 2

• 4

• 6

• none of the above

Multiple Choice

Which of the following determines the identity of an element?

• number of protons

• atomic mass

• number of neutrons

• number of shells

Multiple Choice

What is the atomic number of this atom?

• 4

• 5

• 9

• none of the above

Atomic Mass

• Protons and neutrons each have a mass of 1 amu, while electrons weigh nothing

• ​All the mass of an atom is in its nucleus

• ​When you add the protons and neutrons together, you get the atomic mass.

• ​Carbon has 6 protons and 6 neutrons, so its atomic mass is 12

Multiple Choice

What is the atomic mass number?

• the number of protons in the nucleus

• the number of protons and neutrons in the nucleus

• the number of neutrons in the nucleus

• the number of protons and electrons in the atom

Multiple Choice

Oxygen has a mass of...

• 8

• 16

• 15

• 6

Multiple Choice

True or False - Protons and Neutrons have about the same mass.

• True - They have about the same mass

• False - They do not have about the same mass

Multiple Choice

What is the mass number of this atom?

• 1

• 3

• 4

• 7

Number of Protons and Electrons

• ​Atoms are most stable when their electrical charge = 0

• ​An electrically neutral atom needs an equal number of protons (each has a +1 charge) and electrons (each has a -1 charge)

Multiple Choice

In order for an atom to be neutral what has to be true?

• The atom has more protons than neutrons

• The atom has more neutrons than protons

• The atom has the same number of protons and neutrons

• The atom has the same number of protons and electrons

Multiple Choice

How many electrons does sulfur have

• 16

• 32

• 48

• 12

Multiple Choice

An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?

• 15

• 31

• 16

• 47

Number of Neutrons

• ​Neutrons have no charge and are not always the same as the number of protons or electrons

• ​To find the number of neutrons you subtract the atomic number (number of protons) from the atomic mass (protons and neutrons)

Multiple Choice

How is the number of neutrons in the nucleus of an atom calculated?

• Add the number of e- and p+ together

• Subtract the number of e- from p+

• Subtract the number of p+ from the mass number

• Add the mass number to the number of e-

Multiple Choice

How many neutrons does platinum have?

• 78

• 117

• 195

• 196

Multiple Choice

An element with a mass number of 11 and an atomic number of 5 has how many neutrons?

• 11

• 5

• 6

• 16

Multiple Choice

Bromine has how many Neutrons?

• 35

• 80

• 45

• 8

Multiple Choice

How many neutrons are in Tungsten

• 110

• 74

• 183

• 258