7.1.2-The Structure of Atoms

I. What are the parts of the current (modern) model used today?

• 2 PARTS:

• NUCLEUS: the dense/solid CENTER part of an atom where most MASS is found.

• Contains PROTONS and NEUTRONS

I. What are the parts of the current (modern) model used today?

• ELECTRON CLOUD:  mostly empty space surrounding the nucleus, where electrons are found.

• Broken in to ENERGY LEVELS:  The DISTANCE an electron is away from the nucleus (specific ORBITALS can be found within each energy level).

• Electrons can change energy levels (gain energy=moving up; lose energy=down)

Multiple Select

Which particle(s) is/are found in the nucleus

• proton

• neutron

• electron

• all of them

Multiple Choice

Which sub-atomic particle is the "atomic glue" of the nucleus and has no charge?

• proton

• neutron

• electron

• ion

Multiple Choice

Which sub-atomic particle gives an atom its identity

• proton

• neutron

• electron

• isotope

Multiple Choice

You an change an element into another element by adding or subtracting its total number of

• protons.

• neutrons.

• electrons.

Multiple Choice

1. What are the charges of the subatomic particles?

• p+, e-, n°

• p°, e+, n-

• p-, e°, n+

Multiple Choice

Where do you find the subatomic particles?

• In the empty space between atoms
• In the protons of an atom
• In the outermost shell of an atom
• In the nucleus of an atom and in the electron cloud surrounding the nucleus.

Multiple Choice

What is an atom?

• Is the smallest particle of a cell

• Is the smallest part of matter

• Is the particle of the universe

Multiple Choice

The attached image of Hydrogen Chloride is a...

• Atom

• Element

• Molecule

• Compound

Multiple Choice

Which TWO elements combine to make a Carbon Dioxide compound?

• Carbon and Hydrogen

• Carbon and Oxygen

• Hydrogen and Oxygen

• Carbon and hydroxide

Atomic number and protons

The atomic number of an element is usually on top of the element symbol, and it indicates how many protons it has. For example, Nitrogen has 7 protons, and Oxygen has 8. If you could add one proton to a nitrogen atom, you end up with an atom of oxygen.

Atomic number and protons

Find a periodic table or use the one in Schoology. Fill in the blanks in the table.

Multiple Choice

If an atom contains exactly three protons, then it's an atom of _______.

• Lithium

• Gold

• Nitrogen

• Carbon

Multiple Choice

What does the nucleus of an CARBON atom contain?

• 4 Electrons and 3 neutrons

• 6 Protons and 6 neutrons

• 4 Protons and 6 neutrons

• 12 Protons

Multiple Choice

What is the number of protons that the element in this image contain?

• 14

• 7

• 15

• 18

Multiple Choice

How many protons does Potassium have?

• 19

• 39

• 20

• None of the above

Multiple Choice

How many protons are in an atom of oxygen?

• 8

• 16

• 24

• 32

Multiple Choice

The center of the atom was the

• neutrons

• protons

• electrons

• nucleus

Multiple Choice

The center of the atom contained

• protons and electrons

• protons and neutrons

• electrons and mass number

• mass number

Multiple Choice

Which particle of the atom has positive charge?

• electron

• proton

• neutron

• none of the above

Multiple Choice

The number of protons in the nucleus is the

• atomic number

• atomic mass

• electron cloud

• nucleus number

Multiple Choice

The number of protons determines the

• atomic mass

• electron cloud

• identity of the element or atom

• weight of the element

Atomic Mass and Mass Number

Module 3 - Physical Science

The Periodic Table of Elements

• The Periodic Table is an organizational tool used by scientists to place elements into different categories.

• Elements are the building blocks of matter, each having different chemical and physical properties.

• Today, we will be looking at what atoms are composed of, and how we describe those atoms.

Review

• The atomic number is the number of protons in the element.

• The atomic mass is the number of protons and neutrons in one atom of that element.

• All elements are electrically neutral, meaning they have ZERO NET CHARGE. This means that the number of protons (positive charges) are equal to the number of neutrons (negative charges)

Review

• The element Helium (He) has an Atomic Number of 2. This means that all Helium atoms have exactly two protons.

• Since the atom is electrically neutral, that means the atom also has exactly two electrons.

• How do we determine how many neutrons there are in an atom?

Review

• Atomic Mass = Protons + Neutrons

• We round the atomic mass to the nearest whole number, 4

• Since we already determined that Helium has two protons, that means: 4=2+Neutrons

• There must be 2 Neutrons in one atom of Helium

Let's Practice Together!

• What is the Atomic Number?

• What is the Atomic Mass?

• How many protons are in a Lithium Atom?

• How many electrons are in a Lithium Atom?

• What is the rounded Atomic Mass?

• How many neutrons are in a Lithium Atom?

Let's Practice Together!

• What is the Atomic Number? 3

• What is the Atomic Mass? 6.941

• How many protons are in a Lithium Atom? 3

• How many electrons are in a Lithium Atom? 3

• What is the rounded Atomic Mass? 7

• How many neutrons are in a Lithium Atom? 7-3=4

Multiple Choice

What is the Atomic Number for Beryllium (Be)?

• 4

• 9.012

• 9

• 5

Multiple Choice

What is the Atomic Mass for Beryllium (Be)?

• 4

• 9.012

• 9

• 5

Multiple Choice

How many Protons are in one atom of Beryllium (Be)?

• 4

• 9.012

• 9

• 5

Multiple Choice

How many Electrons are in one atom of Beryllium (Be)?

• 4

• 9.012

• 9

• 5

Multiple Choice

What is the Rounded Mass of Beryllium (Be)?

• 4

• 9.012

• 9

• 5

Multiple Choice

How many neutrons are in one atom of Beryllium (Be)?

• 4

• 9.012

• 9

• 5

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Multiple Choice

A nucleus with 5 protons and 5 neutrons has a total charge of _____.

• 0

• +5

• +10

• -5

Multiple Choice

How do you know if an atom is an isotope?

• It has more or less neutrons than protons.

• It has more electrons than protons.

• It has no electrons.

• It has no nucleus.

Multiple Choice

True or false: An atom with 5 protons and 6 neutrons is an isotope.

• True

• False

Multiple Choice

True or False: An atom with 6 protons and 6 neutrons is an isotope.

• True

• False

Multiple Choice

True or false: an atom with 5 protons and 3 electrons is an ion.

• True

• False

Multiple Choice

An ion with 17 protons and 18 electrons has an overall charge of ___.

• -18

• -1

• +1

• +17

Multiple Choice

An ion with 6 protons and 5 electrons has an overall charge of ___.

• -5

• -1

• +1

• +6

Multiple Choice

An atom that has gained or lost electrons in an attempt to become stable/bond with another atom.

• Normal/Neutral Atom

• Ion

• Isotope

Multiple Choice

A negatively charged ion that has gained electrons to satisfy the octet rule (metals do this)

• Anion

• Cation

• Neutral Atom

• Isotope

Multiple Choice

A positively charged ion that has lost electrons to satisfy the octet rule (non-metals do this)

• Anion

• Cation

• Neutral Atom

• Isotope

Multiple Choice

If an atom has 9 protons and 10 electrons it has a charge of ____.

• 0

• -1

• +1

• -2

Multiple Choice

If an atom has 4 protons and 2 electrons it has a charge of ____.

• 0

• -2

• +2

• +1

Multiple Choice

If an atom has a charge of +3 and an atomic number of 5 it should have _______ electrons.

• 1

• 2

• 3

• 4

Multiple Choice

If an atom has a charge of -2 and an atomic number of 16 it should have _______ electrons.

• 14

• 16

• 18

• 20

Multiple Choice

If an atom has a charge of 0 (neutral) and an atomic number of 8 it should have ____ electrons.

• 0

• 8

• 7

• 9

Multiple Choice

How many electrons does this magnesium ion have?

• 24

• 12

• 10

• 14

Multiple Choice

A negative ion is called _______.

• an anion

• a neutron

• an isotope

• valence

Multiple Choice

A positive ion is called _______.

• a cation

• an anion

• a metalloid

• a neutron

Multiple Choice

If an atom has an equal number of protons and electrons, it is _____.

• a positive ion

• a negative ion

• an isotope

• a neutral atom

Multiple Choice

If an atom has more electrons than protons, it is _____

• a positive ion

• a negative ion

• an isotope

• a neutral atom

Multiple Choice

If an atom has more protons than electrons, it is _____.

• a positive ion

• a negative ion

• an isotope

• a neutral atom

Multiple Choice

This is an atom with a charge. 

• omni
• oni
• ion
• ouch-e

Multiple Choice

You see an model of an atom with 5 protons and 4 electrons. What kind of atom is this? 

• positive ion 
• negative ion 
• neutral ion 
• strange ion

Multiple Choice

These subatomic particles are taken or removed to form ions. 

• neutrons 
• protons 
• electrons 
• nimrons 

Match

Match the following if you were to add or take away a subatomic particle.

• Proton

• Neutron

• Electron

new element

isotope

ion

• new element

• isotope

• ion

Match

Match the following subatomic particles to their charge

• proton

• neutron

• electron

positive

neutral

negative

• positive

• neutral

• negative

Match

Match the following

• atomic mass

• atomic number

• the charge of element

to determine how many neutrons in atom

to determine the element

ion or neutral atom

• to determine how many neutrons in atom

• to determine the element

• ion or neutral atom

Poll

How do you feel about the lesson?