Elements
What does H stand for? (Spell it out!)
Hydrogen
How many significant figures are in 02.30 x 10^5?
3 significant figures
What is the smallest particle in an atom called?
The electron
What is the numerical charge of a neutron?
Zero (0)
In what part of an atom can protons be found?
The nucleus
What do N and O stand for? (Spell them out!)
Nitrogen and oxygen
Rewrite in scientific notation and to the correct number of significant figures: 255 x 10^‒1
2.55 x 10^1
What are negative ions called, and how do their number of protons and number of electrons compare to their neutral counterparts?
Anions; they have the same number of protons but a larger number of electrons compared to their neutral counterparts
Most of an atom is made up of _____.
Empty space (or words to that effect)
Boron and silicon are specific examples of what type of element?
Metalloids (or semimetals)
What are the symbols for iron and sodium respectively?
Fe and Na
Rewrite the following numbers in scientific notation and to the correct number of significant figures: 1090 & 0.02050
1090 = 1.09 x 10^3
0.02050 = 2.050 x 10^‒2
How many valence electrons are in an atom of arsenic and potassium respectively?
5 and 1
Explain what happens when fireworks give off color on the basis of electronic states.
When they give off color, they go from the excited state back down to the ground state.
How many orbitals exist for the 2s, 3d, and 4p sublevels respectively?
1, 5, and 3
What do F and P stand for? (Spell them out!)
Fluorine and phosphorus
What is (1.6 x 10^3) / (4.0 x 10^1) in decimal notation to the correct number of significant figures?
40.
Provide the orbital diagram for the last occupied subshell of a 4+ ion of manganese.
(See board)
Provide the full electron configuration for a 2+ ion of palladium.
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 4d8
What is the name of the group on the periodic table whose -1 ions have 8 valence electrons?
Halogens
What are the symbols for lead, mercury, and tungsten respectively?
Pb, Hg, and W
What is (4.8 x 50.) / (2.4) to the correct number of significant figures?
1.0 x 10^2
Two elements in the fourth row of the periodic table are diamagnetic in both their neutral state and as +2 ions. What are both elements?
Ca and Zn
Which element in the fourth row of the periodic table is the most paramagnetic, and how many unpaired electrons does it have in its orbital diagram?
Cr, six unpaired electrons
What fourth-row element has a +3 ion that has five unpaired electrons? To support your answer, draw all relevant orbital diagrams.
Fe (see board for diagram)