Amu Chemistry

Atoms & the Periodic Table Competition

​We'll review...

• ​the structure of the atom

• ​symbolic notation

• ​isotopes

• ​the periodic table

• ​periodic table trends

Multiple Choice

What is the heaviest part of the atom?

• nucleus

• electron cloud

• neutrons

Multiple Choice

What is the largest part of the atom that contains electrons?

• nucleus

• electron cloud

• neutrons

Multiple Choice

Which answer choice correctly arranges in increasing size (smallest to biggest)?

• atom, electron cloud, nucleus, protons, electrons

• electrons, protons, nucleus, electron cloud atom

• protons, electrons, electron cloud, atoms, nucleus

Multiple Choice

Which part of the atom contains the most mass?

• electron cloud

• nucleus

• protons

Multiple Choice

Lithium gains an electron. What happens to the charge? (HINT: what is the charge of an electron?)

• becomes more positive

• doesn't change

• becomes more negative

Multiple Choice

In symbolic notation, what is the top left number?

• the number of protons

• the number of neutrons

• the mass number

Multiple Choice

What is the mass number?

• the number of protons

• the number of neutrons

• the number of protons plus (+) neutrons

Multiple Choice

An isotope of oxygen gains an electron. How does the mass number change?

• increases

• decreases

•  doesn't change

Multiple Choice

In symbolic notation, what is the bottom left number?

• the number of protons

• the number of neutrons

• the mass number

Multiple Choice

How many electrons are in the symbolic notation pictured to the left?

• 4-0=4

• 2-0=2

• 4-2=2

Multiple Choice

How many neutrons are in the symbolic notation pictured to the left?

• 4-0=4

• 2-0=2

• 4-2=2

Multiple Choice

How many protons are in the symbolic notation pictured to the left?

• 4

• 2

• 0

Multiple Choice

An isotope of selenium has an atomic number of 34. It has 36 neutrons. How many protons does it have

• 2

• 34

• 36

Multiple Choice

Which symbolic notation is correct for an atom with 3 protons, 4 neutrons, and 2 electrons?

Multiple Choice

Why do so many atomic masses have decimals?

• they are a weighted average of isotopes

• they are a weighted average of ions

• they are the number of neutrons and protons

Multiple Choice

Iron (Fe) has 3 stable isotopes: Iron-55, Iron-56, and Iron-57. The average atomic mass is 55.847. Which is the most abundant

• Iron-55

• Iron-56

• Iron-57

Multiple Choice

Beryllium has 2 stable isotopes: Beryllium-9, Beryllium-10. The average atomic mass is 9.0122. What is the most abundant isotope?

• Be-10

• Be-9

Multiple Choice

What element is in Group 15, Period 2

• N

• P

• As

Multiple Choice

What element is in Group 13, Period 4

• Al

• Ga

• In

Multiple Choice

What element is in Group 18, Period 1

• He

• Ne

• Ar

Multiple Choice

Which pair of arrows shown below correspond to the trend for ionization energy?

Multiple Choice

Which pair of arrows shown below correspond to the trend for electronegativity?

Multiple Choice

Which pair of arrows shown below correspond to the trend for atomic radius?

Multiple Choice

What happens to ionization energy as you go down a group (reminder: group = column)

• it increases

• it decreases

• it doesn't change

Multiple Choice

Why is K bigger than H?

• It has more electron shells

• It has more protons

• It has more electrons

Open Ended

Explain the trend for atomic radius as you go DOWN a group. State why it happens.

Multiple Choice

Why is Neon the smallest element in period 2?

• It has the most protons with only 2 electron shells

• it has the most protons in the periodic table

• it has the most electrons

Open Ended

Explain the trend for atomic radius as you go across a period. State why it happens

Multiple Choice

When is the chemistry test?

• Monday

• Tuesday

• Wait, there's a test?