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Periodic Table
Ions, Isotopes, and Chemical Properties
Matter and the Scientific Process
More Ions and Isotopes
Molar Mass, Conversions, Gas Laws
100
The element found in group 14 and in Period 2.
Carbon
100
What are the number of Protons, electrons, and neutrons of the atom with the atomic number 50 and the mass number 125?
50 protons, 50 electrons and 75 neutrons
100
The step of the scientific process which requires you to use your senses to obtain information.
Making an observation, or observing
100
What is the formula for the ionic compound named lithium fluoride?
LiF
100
The mass of 15 moles of hydrogen gas is?
15g
200
This type of element makes up more than two-thirds of the periodic table.
Metals
200
How does the energy of an electron change when it moves closer to the nucleus of the atom?
It decreases
200
What is being measured when 15ml of liquid is placed in a graduated cylinder?
Volume of the liquid
200
What atomic particle is attracted to a positive charge?
An electron
200
200K = what temperature in degrees celsius?
-73
300
All elements in Group 16 on the Periodic Table have the same number of these.
Valence electrons
300
What is the number of electrons in S -2?
18
300
What lab equipment would you use to measure the volume of water? (in ml)
a graduated cylinder
300
How many half lives have passed if you have 1.5g left of an initial sample of 24g of a radioisotope?
4 half lives
300
The mass of 10 moles of NH3 = ?
170g
400
In which group do you find the elements which have a complete octet of valence electrons?
Group 18, and/or Noble Gasses
400
How many electrons does K+ have?
18
400
What is the volume of a substance? (definition)
Volume is how much space the substance occupies
400
What process happening in the Sun causes the production of large amounts of energy?
Nuclear fusion
400
How many moles of Na would you need to produce 4 mol of NaCL? 2Na(s)+CL2(g)--> 2NaCl(s)
4
500
What type of element is Lithium?
Metal
500
Isotopes of the same element have different numbers of these.
Neutrons
500
How do you correctly read the volume of water in a graduated cylinder?
Read the number which matches the bottom of the water's meniscus.
500
How much radioisotope was the initial sample there were 5g left after 2 half lives?
20g
500
The ideal gas law is PV=nRT. What is the constant for every gas?
R = .0821