Exam 1 Review

Essential Math Skills

100

Name a number larger than 5,000 in scientific notation

Various Answers

200

What is 36% of 900?

324

300

If x= (y+2)/3 what does y equal?

y=3x-2

400

What is (3.55 x10^-2) x (9.01 x10⁴) in scientific notation?

3.20 x10³

500

What is x if 4x² = 0.33(y+3)

Show on screen

The Periodic Table and trends

100

What are the columns (1) and rows (2) on the periodic table called?

(1) groups, (2) periods

200

What classes of elements (more specific than metal, nonmetal, etc.) are Na and F?

Na= alkaline metal, F= Halogen

300

What are the three periodic trends we learned so far?

Atomic Radii, Ionization energy, metal character

400

Name an element with a larger atomic radius than Zinc (Zn) and a lower metallic character than Strontium (Sr)

Various answers

500

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

Isotopes

100

What makes one isotope different from another of the same element?

The number of neutrons

200

Why do we need an average atomic mass of elements?

To accurately predict the mass of large amounts of atoms/ because of isotopes

300

If element X has two isotope, (X-35, 45% abundant) and (X-44, 55% abundant), what is its average atomic mass?

39.95amu

400

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

500

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%

Orbitals

100

What are the four orbital blocks on the periodic table?

s, p, d, f

200

How many orbitals are in the s sublevel (1) and p sublevel (2)

(1) s-1, (2) p-3

300

What’s the orbital diagram for Potassium (K)?

See Drawing

400

What is the orbital diagram of Copper (Cu)

See Drawing

500

How many pairs of electrons does Silver (Ag) have?

23 pairs, 46 electrons

Electron Configurations

100

What is the first orbital filled in every element?

1s

200

What is the electron configuration for Al?

1s² 2s² 2p⁶ 3s² 3p¹

300

If an element has 16 electrons what will be its electron configuration?

1s² 2s² 2p⁶ 3s² 3p⁴

400

What is the electron configuration for Manganese (Mn)

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵

500

How many valance electrons (1) and non-valance electrons (2) does Gallium (Ga) have?

(1) 3 valance electrons and (2) 28 non-valance electrons