Review Of 101

Question 1

Mass Number Formula

Answer 1

Mass number = #protons + #neutrons

Question 2

Atomic mass Formula

Answer 2

Atomic Mass= Mass of protons + Mass of Neutrons + Mass of electrons

Question 3

Chemical formula

Answer 3

The representation of a molecule that uses chemical
symbols to indicate the types of atoms followed by subscripts to show the
number of atoms of each type in the molecule. (A subscript is used only when
more than one atom of a given type is present.)

Question 4

Structural Formula

Answer 4

It gives the information as its molecular formula (the types and numbers of atoms in a molecule) but also shows how the atoms are connected.

Question 5

Empirical Formula

Answer 5

Indicated the types of atoms present and the simplest whole-number ratio of the number of atoms in the compound. Example : Vinegar’s formula is CH3COOH and the empirical formula is CH2O

Question 6

The Mole

Answer 6

The amount of substance containing the same number of discrete entities (such as atoms, molecules, and ions) as the number of atoms in a sample of pure 12C weighing exactly 12 grams.

Question 7

Avogadro Number

Answer 7

6.022 * 10^23

Question 8

Molar Mass

Answer 8

The mass in grams of 1mol of the substance

Question 9

Electromagnetic Spectrum