Atomic # equals Protons equals Electrons

To calculate AAM, first

You multiply the masses of the isotopes by their % abundance

The Atomic Mass on the periodic table is

The weighted average mass of the isotopes

Which of these is NOT a characteristic of a mixture?

Mixtures must have a definite composition

Do NOT depend on how much matter there is

Mass equals Atomic # plus Neutrons

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Matter & Change, Atomic History & Structure

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A #chemistry quiz for reviewing #matter and change and #atomicstructure & the #historyoftheatom

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Questions 25

Answers

1
APE stands for
Atomic Mass equals Protons equals Electrons
Atoms equals Protons plus Electrons
Atoms plus Protons equals Electrons
Atomic # equals Protons equals Electrons
2
JJ Thompson
Discovered the nucleus
Discovered electrons
Discovered neutrons
Discovered the atom
3
To calculate AAM, first
You multiply the masses of the isotopes by their % abundance
What's AAM?
You multiply by 100
You add all the masses of the isotopes
4
Which description indicates a chemical property?
Evaporates at 100°C
Reacts with water
Metallic
Malleable
5
The Atomic Mass on the periodic table is
The weighted average mass of the isotopes
Protons + Neutrons
Protons + Neutrons + Electrons
The mass of the isotopes added together
6
Deposition is when
Gas turns to solid
Solid turns to gas
Liquid turns to solid
Liquid turns to gas
7
Which is NOT a chemical property?
Explodes in water
Solid at room temperature
Flammability
Ability to corrode
8
John Dalton
Suggested atoms
Is the father of chemistry
Is the father of atomic theory
Discovered the nucleus
9
Which of these is NOT a characteristic of a mixture?
Mixtures can be separated by physical means
Mixtures must have a definite composition
Mixtures contain more than one element
Mixtures can be homogenous & heterogenous
10
AAM of Be is 9.012. What's the most abundant isotope?
Be-5
Be-9
Be-4
Be-8
11
If two elements are chemically bonded they are
A new element
A solid
A mixture
A compound
12
Ernest Rutherford did NOT
Discover electrons
Discover protons
Discover the nucleus
Discover that the atoms is mostly empty space
13
Which mixture is Homogenous?
Caesar Salad
Beach sand
Air
Strawberry Ice Cream
14
Elements are defined by their
Electrons
Neutrons
Isotopes
Protons
15
Intensive properties
Depend on how much matter there is
Are chemical properties
Do NOT depend on how much matter there is
Change if you add mass
16
How many neutrons in Sodium-24?
24
22.990
13
11
17
MAN stands for
Mass equals Atomic # equals Neutrons
Matter equals Atoms minus Neutrons
Atomic # equals Protons equals Electrons
Mass equals Atomic # plus Neutrons
18
Which are pure substances?
Homogenous & Heterogenous Mixtures
Elements & Compounds
Elements & Solutions
Compounds & Mixtures
19
Isotopes are defined by
The number of neutrons
The number of protons
The number of electrons
The number of positrons
20
Mixtures can be classified as
Pure & Impure
Elements & Compounds
Homogenous & Heterogenous
Energy & Matter
21
Who first suggested the idea of atoms?
James Chadwick
John Dalton
Democritus
JJ Thompson
22
CuCl₂ (Copper Chloride) is an example of
Alloy
Heterogenous Mixture
Homogenous Mixture
Pure Substance
23
Which one is a mixture?
Sodium Bromate (NaBrO3)
Aluminum (Al)
Salt Water (NaCl and H2O)
Water (H2O)
24
The nucleus is
Positive & Dense
Mostly free space & Negative
Negative & Dense
Mostly free space & Positive
25
Density is
Extensive
Intensive

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