Number protons+ number neutrons

Purpose of scientific method

Answer questions, explain the world

Study of the composition of properties, and interactions of matter

Equal but opposite charges that are separated by short distance

Pauli expression principle

Electrons in the same orbital must have opposite spins

Says that the chemical and physical properties of the elements repeat

Electrons fill low energy sublevel first

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Mid year review

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Questions 23

Answers

1
Mass number
Number electrons+ number neutrons
Number protons+ number neutrons
Number neutrons+ number electrons
2
Avogadro’s number
6.02x1023
3939
18
6.04x1022
3
AB2
Octahedral
Linear
Trigonal planar
Bent
4
Intermolecular force that’s always present
Hydrogen bonding
London Dispersion
Dipole-Dipole
5
Purpose of scientific method
Get research
Answer questions, explain the world
Learn about chemistry
Complete problems
6
Average atomic mass of carbon
14.80
12.01
12.92
12.09
7
Chemistry
Learning about science
Study of the composition of properties, and interactions of matter
Learning about nature
Doing problems
8
Hydrogen bonding must have Polar Molecules, Hydrogen, and Nitrogen Fluoride, or Nitrogen
False
True
9
Dipole
When boiling, molecules pull away from others to become a gas
Atoms in compounds strongly held together by bonds
Equal but opposite charges that are separated by short distance
10
Pauli expression principle
Electrons in the same orbital must have opposite spins
Electrons in same orbital must have same spin
Electrons in different orbitals must have same spin
Electrons in different orbitals must have different spins
11
Electrons in the atom orbit the nucleus
True
False
12
There are 7 shapes in Molecular Geometry
True
False
13
Periodic law
Says that the chemical and physical properties of the elements repeat
All periods in the periodic table are equal
The periodic table is always right
14
How many base units are there
8
5
3
10
15
A mole of any element will weight the elements atomic mass
False
True
16
Base unit for length is feet
True
False
17
Aufbau principle
Electrons fill high energy sublevel first
Electrons fill low energy sublevel first
Electrons fill middle energy sublevel first
18
Base unit for time
Minutes
Hours
Seconds
Years
19
AB3E
Bent
Trigonal Pyramidal
Octahedral
Linear
20
Nuclei are always stable
False
True
21
Hypothesis
Right answer
Educated guess
Question
Statement about chemistry
22
Wavelength is the distance between 2 peaks
True
False
23
How many wave properties are there
8
7
5
4

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