Electrons can be controlled in a cathode ray tube because

Electric charges react to magnetic fields

If compounds are prepared in pairs and their oxygen ratios found...

3:2 satisfies law of multiple proportions

People accept atomic theory because

100000+ experiments have been performed, none disprove it

Natural abundance means

how commonly a certain isotope is found in nature (%)

Unstable nuclei result when

# of neutrons greatly exceeds Z

Molar mass is different from atomic mass in

units: molar mass is grams per mole

The charge of the electron was found from

Millikan and the oil drop experiment

The discovery of the electron was a result of

JJ Thompson and his cathode ray tube

The idea that the nucleus is insignificant in size compared to the orbit of electrons was from

Rutherford and the gold-foil experiment

The 2 main sections of the PT are called

Main group and transition elements

sum count of protons and neutrons

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Chem List 2 17-18

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Questions 35

Answers

1
Electrons can be controlled in a cathode ray tube because
They are light enough to be deflected by air inside the tube
Electric charges react to magnetic fields
They are easy to see when illuminated
A gun shoots them with a precise trajectory
2
Avogadro's number (1 mol) is
6.02 x 102
6.02 x 1023
3.02 x 1013
1.02 x 1023
3
If compounds are prepared in pairs and their oxygen ratios found...
5.2:6.6 satisfies law of multiple proportions
3:2 satisfies law of multiple proportions
1:2.3 satisfies law of multiple proportions
3.2:2.2 satisfies law of multiple proportions
4
If a nucleus was a 1 cm line on Mr. Frantsen's whiteboard, the electron would be
In the cafeteria
In the principals office
In the Ag building
Halfway to the highway
5
Radioactivity is a result of
Cosmic collisions
Nuclear holocaust
Unstable nuclei decaying
Bright light
6
The first column of the PT is called
Alkaline Earth Metals
Halogens
Noble Gases
Alkali metals
7
Halogens are found where on the PT?
Middle
2nd to last column
Trick question, not on the PT
1st column
8
People accept atomic theory because
It just feels right
100000+ experiments have been performed, none disprove it
One decisive experiment proved it
It was proven by 100000+ experiments
9
The part of an atom that determines its identity is the
neutrons
electrons
protons
quarks
10
Atomic Number is a fancy way of saying
number of positrons
number of neutrons
number of electrons
number of protons
11
Natural abundance means
how commonly a certain ion is found in nature (%)
the number of kilograms of a heterogeneous mixture (kg)
how commonly a certain element is found in nature (%)
how commonly a certain isotope is found in nature (%)
12
Elements that fall on the staircase on the PT
Are metals
Are halogens
Are non-metals
Are metalloids
13
The second column on the periodic table is called
Halogens
Alkali Metals
Noble Gases
Alkaline Earth Metals
14
The fundamental unit of charge found on all electrons we call "-1" is
3.6 x 107 C
1.6 x 10-19 C
1.8 x 1025 C
2.6 x 1012 C
15
Unstable nuclei result when
# of neutrons greatly exceeds A
# of neutrons much less than A
# of neutrons much less than Z
# of neutrons greatly exceeds Z
16
An ion is different from an atom in
the number of electrons
the atomic number
the number of protons
the number of neutrons
17
Molar mass is different from atomic mass in
sign: molar mass is positive
units: molar mass is amu
sign: molar mass is negative
units: molar mass is grams per mole
18
The charge of the electron was found from
Rutherford and the gold-foil experiment
Millikan and the oil drop experiment
JJ Thompson and his cathode ray tube
Dalton and his laws of proportions
19
Anions are
Postitive
Negative
20
The discovery of the electron was a result of
Dalton and his laws of proportions
JJ Thompson and his cathode ray tube
Millikan and the oil drop experiment
Rutherford and the gold-foil experiment
21
The elements in a certain column in the periodic table are similar in...
the size of their electron orbit
their atomic mass
their natural abundance
how they chemically react
22
1 mole of pennies would make how many trips to and from Sun to Pluto?
117,000,000
zero, too small
1000
1
23
The idea that the nucleus is insignificant in size compared to the orbit of electrons was from
JJ Thompson and his cathode ray tube
Rutherford and the gold-foil experiment
Dalton and his laws of proportions
Millikan and the oil drop experiment
24
The 2 main sections of the PT are called
Main group and transition elements
Lanthanides and actinides
Alkali metals and Alkaline earth metals
Halogens and noble gases
25
Charge is measured in
coulombs (C)
tesla (T)
amperes (A)
inches (in)
26
Mass number is
number of neutrons
sum count of protons and neutrons
number of electrons
sum count of electrons, protons, and neutrons
27
Cations are
Positive
Negative
28
Elements to the left of the staircase on the PT are
-
+
29
The idea that a certain compound is always the same elements in the same ratio
Law of Definite Proportions
Atomic Theory
Nuclear Theory
Law of Multiple Proportions
30
In an atom that has not been ionized (0 charge), the number of protons
equals the sum count of electrons and protons
equals the number of electrons
equals the number of neutrons
is zero
31
The elements to the right of the staircase on the PT are
+
-
32
The thing that makes isotopes different is
The number of quarks
The number of electrons
The number of neutrons
The number of protons
33
Nitrogen Dioxide would be different if
prepared in a backyard
never, its always NO2
prepared inside a volcano
prepared in a research lab
34
One atomic mass unit represents
1.67 x 10-27 kg
3.67 x 10-28 kg
6.67 x 10-27 kg
1.67 x 107 kg
35
Noble gases are called such because
They occur by themselves
They don't react with anything
The have smaller natural abundances
They rule the other elements in noble "families"

Chem List 2 17-18 Flashcards | StudBud