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Chem 1 Review Flashcards | StudBud
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Chem 1 Review
Chem 1 Review
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1
During hydrogen bonding, hydrogen is highly attracted to the oxygen atom of another water molecule
True
False
2
The energy that was added to metals during the flame lab only allowed the electrons to change orbitals
False
True
3
Which of the following statements are true? - pick 3
All elements want to be like a noble gas
The noble gases are very reactive
An octet is a stable electron configuration
All group 18 elements have a stable electrons configuration
4
The mass of the particles emitted from the cathode ray experiment are...pick 3
deflected by a positive charge
present in all atoms
of a smaller mass than the lightest atom
negatively charged
5
In a flame test, which of the following is happening? pick 3
The same amount of energy that was absorbed is being given off as light
Electrons from metals gain energy from heat
Colors in the visible light include the ROYGBIV Colors
All metals emmit the same color
6
Where are metals on the periodic table
scattered all over
only in the middle
on the left side and middle (transition)
on the right side
7
Which of the following is FALSE?
The atomic emission spectrum for hydrogen and helium are the same
The atomic emission spectrum for every element is different
The electrons in each element jump to different orbits, making each unique
Each element has a unique line emission spectrium, like a fingerprint
8
According to Rutherford's gold foil experiment....pick 2
proved the existance of neutrons
Atoms are made up mostly of empty space
Atoms are made up of very little empty space
The atom has a positively charged, densely packed nucleus
9
Which are the OTHER TWO of postulates on modern atomic theory? - Pick 2
Chemical reactions occur when atoms are separated, joined, & rearranged.
Atoms of the same element have different masses.
Atoms can be divided into smaller particles
Atoms cannot be changed as a result of a chemical reaction, just rearranged
10
Energy cannot be created or destroyed
False
True
11
Covalent compounds are made up of
all nonmetals
a metal and a nonmetal
metals only
all metalloids
12
Which of the following is TRUE?
Each wavelength on the electromagnetic spectrum is the same color
Wavelength and energy are directly proportional
Red wavelengths have the highest energy
Each wavelength on the electromagnetic spectrum has a unique color
13
This is the two dimensional molecular model for water
False
True
14
It is the metal in a compound that gives flames their color in a flame test
True
False
15
In H
2
O molecules, which are polar, which element has a slight negative charge due to a difference in electronegativity?
neither hydrogen nor oxygen. Water is not polar
oxygen
both hydrogen and oxgyen
hydrogen
16
Oxygen is more electronegative than hydrogen
False
True
17
In an exothermic chemical or physical change, what is happening? - pick 2
heat is lost to the surroundings
The temperature goes up
Temperature goes down
temperature never goes up or down in a chemical change
18
In an ionic bond...pick 2
metals get together with nonmetals
A weak bond is formed between a metal and a nonmetal
There is a transfer of valence electrons from the metal to the nonmetal
metals get together with other metals
19
In an ionic bond, cations lose their electrons to anions.
False
True
20
Photons get emitted in a flame test in the form of visible light (ROYGBIV)
True
False
21
Nonmetals are always cations
False
True
22
The cathode-ray experiment proved the existence of the
all of the above
electron
proton
neutron
23
The mass of an atom is made up of its protons plus neutrons
True
False
24
Atoms can gain or lose electrons
True
False
25
Atoms can gain or lose protons
False
True
26
According to Dalton, atoms could not be split, and no particle was smaller than an atom
False
True
27
During hydrogen bonding, hydrogen is attracted to a more electronegative atom from another molecule, like oxygen
False
True
28
The mass to charge ratio was known as a result of the Cathode Ray experiment
True
False
29
In the gold-foil experiment; pick 2
All alpha particles behaved exactly the same way
Positively charged alpha particles were deflected by the + charged nucleus
Some alpha particles passed straight through due to empty space
Alpha particles deflected at the same angle every time
30
To figure out how many neutrons an element has, substract the atomic number from the atomic mass
False
True
31
Isotopes are atoms of the same element that....
differ in their number of protons
all atoms of the same element have the same # of every kind of particle
differ in their number of electrons
differ in their number of neutrons
32
Which are TWO of John Dalton's postulates on modern atomic theory? pick 2
Atoms of the same element are all different
Atoms cannot be created or destroyed
All elements are composed of tiny INDIVISIBLE particles called atoms
Atoms can be changed as a result of a chemical reaction
33
According to ROYGBIV, violet has the shortest wavelengh and the highest energy
False
True
34
Today's periodic table is arranged by:
triads
Chadwick; by increasing nuetron count
Mendeleev; by increasing atomic mass
Moseley; by increasing atomic number
35
Why are group one elements so reactive?
made up of nonmetals
Have 2 valence electrons
Have 1 valence electron
it is false; group one elements are not reactive
36
Which elements are the most reactive of those listed?
Group 18
Group 1
Group 5
Group 12
