Miscellaneous

Question 0

What is a Lewis Structure?

Answer 0

The element symbol which shows the valence electrons (highest energy level)

If an ion is positive than the Lewis symbol is the same as writing the ion.

If an ion is negative, you must put brackets around it and the charge of the negative ion outside of the brackets.

Question 1

1 mole is how many particles?

What can a particle be?

How many atoms in one molecule of nitrogen gas? (N )
2

How many molecules in one mole of nitrogen gas?

Answer 1

1. 6.022x10^23 particles
2. Atoms, ions, molecules, formula units
3. 2 atoms of nitrogen in one molecule Nitrogen gas
4. (6.022 x 10^23) x 2

Question 2

How can you tell the amount of valence electrons?

Answer 2

By looking at the group number of the element. For example, a chlorine atom (no charge) has 7 valence electrons. A chloride ion (negatively charged) has an extra electron and therefor has 8 valence electrons

Question 3

A single orbital can only hold how many electrons?

Answer 3

2

Question 4

What is orbital notation?

Answer 4

When you put the arrows up and down in the energy levels (1-7) and the sub levels (s-1, p-3, d-5, f-7) (think “s,pdf)

Question 5

What is hepta?

Answer 5

7

Question 6

Molecular formula (which is different from a molecular equation btw)

Answer 6

Molecule/molar mass (in grams)
———————————– = An even number
Empirical formula (in grams)

Take that even number and multiply original formula by it

Question 7

(Aq) means

Answer 7

Aqueous, dipped in water, you use this for acids and for soluble elements. If it is a solid (s) it means not soluble in water and you must write a NET IONIC EQUATION FOR THESE

Question 8

What is a Hyphen symbol?

What is a mass number?

Answer 8

Element name/symbol followed by a dash and the mass number.

Mass number = sum of protons and neutrons

Question 9

STP stands for?

STP is only for what?

What are the numerical standards for STP?

Answer 9

Standard temperature pressure

Gases

0 degrees Celsius (or equivalent, 273 K) and 1.000 ATM (or equivalent, 101.325kPa, 760.0 mmHg/torr)

Question 10

When decomposing an acid you take out…

Answer 10

A water molecule, and have whatever is left over

Question 11

S orbitals are shaped how?

P orbitals are shaped how?

Answer 11

Spherical, like a circle

Like an infinity sign, and 8 on its side