Approved eye protection devices (such as goggles) are worn in the laboratory
What is Any time chemicals, heat or glassware are used.
100
what is an atomic radius
What is Radius is the distance from the center of the nucleus to the “edge” of the electron cloud.
100
Each energy level represents a(n) _________ on the periodic table
What is period
100
on the periodic table, _____ are the horizontal rows:
on the periodic table, ______are the vertical columns:
What is
period
group
100
what is the electron configuration of an element
What is A. It is the specific way in which the atomic orbitals are filled and how electrons are arranged in an atom
200
a hypothesis is best described as
What is a testable prediction
200
what is the trend for atomic radius
What is he trend for atomic radius in a group is to go from smaller at the top to larger at the bottom
200
Atomic orbitals are where ________ are found
What is electrons
200
I am Nitrogen (N). My atomic number is 7. I am a poor conductor of heat and electricity, and I gain/share electrons easily. What am I?
What is nonmetal
200
Write the complete electron configuration for Calcium (Ca)
What is 1s2 2s2 2p6 3s2 3p6 4s2
300
what is a dependent variable
What is Something that can be measured or observed
300
How does ionization energy change as the size of an atomic radius changes
What is Smaller atomic radius = higher ionization energy
300
what is the atomic number
What is Number of protons = number of electrons
300
I am Neon (Ne). My atomic number is 10. I have a very low re activity with other elements because I am already stable with all the valence electrons that I need! What am I?
What is noble gas
300
Write the Lewis dot structure for Magnesium (Mg)
What is 2
400
what is an independent variable
What is something that is tested/changed
400
what is electronegatvity
What is A measure of an atom’s attraction for another atom’s electrons
400
what is mass number
What is protons + neutrons
400
I am Lithium (Li). My atomic number is 3. I am a very good conductor of heat and electricity, and I give up electrons easily
What is metal
400
Naturally occurring carbon consists of three isotopes, 12C, 13C, and 14C. State the number of protons, neutrons, and electrons in each of these carbon atoms.
12C 13C 14C
6 6 6
What is
6 6 6
6 7 6
6 8 6
500
what are all the steps of the scientific method
What is state a problem, gather info, form a hypothesis, experiment, record data, form a conclusion
500
Why does ionization energy change as the size of an atomic radius changes?
What is IE and AR are inversely proportional. Elements at the top of a group have smaller atomic radii. IE is the energy needed to pull an electron. Thus, it would be harder to pull an electron from their electron clouds if their radii are smaller. That’s why IE is higher as AR are smaller. As you move down a group, AR get bigger, and it gets easier to pull an electron from an atom
500
identify the list of atomic orbitals and their sub-levels
What is
n = 1 has 1 sub-level (the “s” orbital)
n = 2 has 2 sub-levels (“s” and “p”)
n = 3 has 3 sub-levels (“s”, “p” and “d”)
n = 4 has 4 sub-levels (“s”, “p”, “d” and “f”)
500
I am Silicon (Si). My atomic number is 14. I have properties that are in between those of both
metals and nonmetals, and I am located on the stair-step between the metals and nonmetals. What am I?
What is metalloid
500
An oxide of chromium is found to have the following percent composition: 68.4% Cr and 31.6% O. Determine this compound’s empirical formula