Matter

Question 0

Avogadro’s number

Answer 0

6.02 x 10^23rd

Question 1

What is the lowest possible temperature?

Answer 1

-273.15*C or 0 Kelvin

Question 2

Moles

Answer 2

n- number of molecules

Question 3

SI unit of force

Answer 3

N -Newton

Question 4

SI unit of temperature

Answer 4

K-Kelvin

Question 5

SI unit of pressure

Answer 5

Pa-pascal

Question 6

Pressure of atmosphere at sea level

Answer 6

14.7 psi
1atm
101,325 pa
760 mm Hg

Question 7

Ideal gas law

Answer 7

Based on the assumption that there are no forces acting between the molecules of a gas

PV=nRT

Question 8

Combined gas law

Answer 8

Boyle’s, Charles’, Gay-Lussac’s Laws

P1V1=P2V2
T1 T2

Question 9

Dalton’s Atomic Model

Answer 9

1. Matter is made up of atoms
2. Atoms of an element are similar to each other
3. Atoms of different elements are different from each other
4. Atoms combine with each other to form new kinds of compounds

Question 10

Rutherford’s Atomic Model

Answer 10

1. Most of an atom consists of empty space.
2. At the center of the atom is a nucleus that contains most of the mass and all of the positive charges of the atom.
3. The region of the space outside the nucleus is occupied by electrons.
4. The atom is neutral because the positive charge on the nucleus equals the sum of the negative charges of the electron.

Question 11

Bohr’s Atomic Model

Answer 11

1. Electrons orbit the nucleus, but only in discrete orbits or energy levels.
2. Electrons don’t emit radiation when orbiting the nucleus.
3. When an electron moves from an outer orbit or energy level to an inner orbit or energy level, it emits a photon with an energy equal to its energy difference.

Question 12

Atomic mass unit

Answer 12

Equal to 1/12 of the mass of Carbon12

Question 13

Pauli exclusion principle

Answer 13

Electrons in an element all have to have different quantum numbers.

Question 14

Inert gases

Answer 14

Helium, Neon, Argon