Ions
Isotopes
Atomic
Mass
Atomic Structure (Bohr and Lewis)
Potpourri
100
What is a good definition for an ion?
What is an atom that is either positively (cation) or negatively (anion) charged.
100
What is a good definition for an isotope?
What is each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties.
100
How do you calculate the atomic mass of an element?
What is add the # of protons with the # of neutrons.
100
Draw the Lewis-Dot Structure and the Bohr Model of the following element: Carbon:
Show your boards
100
What are the charges on protons, neutrons, and electrons?
Protons are Positive+, Neutrons are Neutral (0), and Electrons are Negative (-)
200
Draw a neutral oxygen atom (Bohr) and an oxygen atom with a +2 charge.
The oxygen should have 8 protons (8 Neutrons) and 8 electrons and the oxygen with a +2 charge should have 6 electrons and 8 protons (with 8 Neutrons).
200

The changes in the number of bonds a Ca-40 and Ca-44 can make.

No difference. 

Calcium Atom should have 20 Protons and 20 Neutrons and the Calcium-44 should have 20 Protons and 24 Neutrons. Both should have 20 electrons.

200
Carbon-12 has an abundance of 98.9% and C-13 has an abundance of 1.1%. What is the average atomic weight of Carbon?
Around 12.011 amu (atomic mass units)
200
Draw the Lewis-Dot Structure and the Bohr Model of the following element: Lead
Show your boards:
200
You travel on a spaceship to a far off planet and measure the atomic weight of a Potassium atom (K). What would you expect it to be?
It would be around 39 atomic mass units. The mass of a Potassium atom is the same everywhere! (so long as it is not an isotope of Potassium other than K-39).
300
Draw a Helium atom and a Helium atom with a -2 charge.
The Helium atom should have 2 protons and 2 neutrons with 2 electrons. The Helium with a -2 charge should have 2 protons and 2 neutrons and 4 electrons.
300
Draw a Chlorine atom (Bohr) and a Chlorine-37 Isotope.
The Chlorine atom should have 17 Protons and 18 Neutrons. The Chlorine 37 Isotope should have 17 Protons and 20 Neutrons. Both should have 17 electrons.
300
Chlorine-35 has an abundance of 75.77% in the atmosphere and Chlorine-37 has an abundance of 24.23%. What is the average atomic mass of Chlorine?
Around 35.48 amu.
300
Draw the Lewis-Dot Structure and the Bohr Model of the following element: Silver
Show your boards:
300
What can you do to prepare for the checkpoint tomorrow?
Review your notes, review the jeopardy review sheet, make flash-cards, have a friend or family member study with you, go on the inter-web. STUDY!
400
Draw a cation of Silicon with a +2 charge.
The Silicon atom has 14 protons, 14 neutrons, and 12 electrons.
400
How do the chemical properties of different isotopes of the same atom compare with one another?
All isotopes of an atom have the same chemical properties. They are identical! They just have different masses.
400
Neon-20 has an abundance of 90.48% in the atmosphere, Neon-21 has an abundance of 0.27% and Neon-22 has an abundance of 9.25%. What is the average atomic mass of Neon?
Around 20.1877
400
Draw the Lewis-Dot Structure and the Bohr Model of the following element: Helium
Show your boards:
400

The heat required to raise the temperature of 56.0 grams of liquid water at room temperature by 3.00 degrees celsius. 


What is 702 joules?

500
What is the difference between Ions and Isotopes?
Ions have a different number of electrons than normal (# of electrons normally = # of protons). Isotopes are different versions, with different masses, of the same atom (same number of protons, different number of neutrons)
500

The correct nuclear symbol for K-39 and K-40. (hint - draw the nuclear symbols)

K has 19 protons, so K39 should have 20 neutrons and K-40 should have 21 neutrons. Both have 19 electrons.

500
Oxygen-16 has an abundance of 99.76% in the atmosphere and Oxygen-18 has an abundance of 0.201%. Would you expect the average atomic mass of Oxygen to be closer to 16amu or 18amu? Why?
Because 99.76% of the Oxygen in the atmosphere is Oxygen-16, I would expect the average atomic mass to be closer to 16 amu.
500
Draw the Lewis-Dot Structure and the Bohr Model of the following element: Lithium
Show your boards:
500

The energy required to completely melt a block of ice is determined to be 83,500 joules. What was the starting mass of the ice block? 

What is 250 grams?

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