Essential Math Skills
Name a number larger than 5,000 in scientific notation
Various Answers
What are the columns (1) and rows (2) on the periodic table called?
(1) groups, (2) periods
What makes one isotope different from another of the same element?
The number of neutrons
What are the four orbital blocks on the periodic table?
s, p, d, f
What is the first orbital filled in every element?
1s
What is 36% of 900?
324
What classes of elements (more specific than metal, nonmetal, etc.) are Na and F?
Na= alkaline metal, F= Halogen
Why do we need an average atomic mass of elements?
To accurately predict the mass of large amounts of atoms/ because of isotopes
How many orbitals are in the s sublevel (1) and p sublevel (2)
(1) s-1, (2) p-3
What is the electron configuration for Al?
1s2 2s2 2p6 3s2 3p1
If x= (y+2)/3 what does y equal?
y=3x-2
What are the three periodic trends we learned so far?
Atomic Radii, Ionization energy, metal character
If element X has two isotope, (X-35, 45% abundant) and (X-44, 55% abundant), what is its average atomic mass?
39.95amu
What’s the orbital diagram for Potassium (K)?
See Drawing
If an element has 16 electrons what will be its electron configuration?
1s2 2s2 2p6 3s2 3p4
What is (3.55 x10-2) x (9.01 x104) in scientific notation?
3.20 x103
Name an element with a larger atomic radius than Zinc (Zn) and a lower metallic character than Strontium (Sr)
Various answers
If element Z has three isotopes and an AAM of 220.1, find the missing isotope mass (Z-212, 5.9%) (Z-225, 27%) (Z-?, 67.1%)
219amu
What is the orbital diagram of Copper (Cu)
See Drawing
What is the electron configuration for Manganese (Mn)
1s2 2s2 2p6 3s2 3p6 4s2 3d5
What is x if 4x2 = 0.33(y+3)
Show on screen
Compare the three periodic trends of Oxygen (O) and Nitrogen (N)
Atomic Radii- N is larger, Ionization energy- O is larger, Metal character- N is larger
If carbon has three isotopes and an AAM of 12.01, given the following info, calculate the missing percentage. (C-12, 98.9%) (C-13, ?%) (C-14, 1 x10^-10%)
1.1%
How many pairs of electrons does Silver (Ag) have?
23 pairs, 46 electrons
How many valance electrons (1) and non-valance electrons (2) does Gallium (Ga) have?
(1) 3 valance electrons and (2) 28 non-valance electrons