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WorksheetsChem/Phys Unit 2 review
Total questions: 41
Worksheet time: 1hrs 22mins
What drop would emit the weakest wavelength of electromagnetic radiation?
E4-E1
E2-E1
E4-E3
E3-E1
What is a group?
a vertical column in the periodic table
a horizontal row in the periodic table
a collective of subatomic particles
a region of space in which electrons may reside
The atomic number is determined by _____________________.
its symbol
the number of protons and neutrons
what the element is
the number of protons in the atom
What drop would emit a strong wavelength of electromagnetic radiation?
E4-E1
E2-E1
E4-E3
E3-E1
The atomic mass is
the number of protons + the number of neutrons
the average mass numbers of the elements' isotopes as found in nature
the weight of an nucleus
The mass number is
the number of protons + the number of neutrons for a given isotope
the average mass numbers of the elements' isotopes as found in nature
the weight of an nucleus
Why are individual atoms invisible to the naked eye?
They absorb light making it impossible for light to bounce back to our eye
They are so small that wavelengths of light cannot bounce off them
You can see atoms with a very powerful light-microscope
They bend light around them to appear invisible
the naked eye is too creepy and should put some clothes on
How come you really can’t “touch” anything?
The electromagnetic fields of the electrons repel other electrons in other atoms
The electromagnetic fields of the protons repel other protons in other atoms.
Midi-chloriens
An unknown force surrounds everything preventing anything from touching
How is the periodic table arranged left to right?
Increasing number of neutrons
Decreasing number of protons
Increasing number of protons
Increasing atomic mass
Why is the symbol for gold Au and lead Pb?
The letters represent the Latin names of those elements
The letters represent the year they were discovered
The letters represent the German names for those elements
The letters represent the Phoenician names for those elements.
Which elements will have similar properties?
H, He, Li
B, C, N
N, P, As
Al, Zn, Ag
Which of these trends do you see as you go across a period in the periodic table?
Usually, a slight increase or decrease in mass
A repeating pattern of properties
An increase or decrease in the number of protons
All of the above
What is the mass number of an oxygen atom with a -2 charge and has 7 neutrons
6
15
16
8
If an atom has 8 protons, 7 neutrons, and 6 electrons, what is its mass number?
2
8
7
13
15
What is the mass of uranium-238?
92
146
238
0
If you were a hotdog, would you eat yourself?
only if I'm kosher
no, hotdogs are gross
you know I would!
no, cannibalism is frowned upon
What is the charge of an atom with an atomic mass of 15, 7 neutrons, and 7 electrons?
0
-1
1
2
-2
What is the mass of an atom that has a charge of -2, 16 neutrons, and 14 electrons?
32
30
16
28
How many protons does an atom containing 5 electrons, mass number of 9, and 4 neutrons have?
5
9
4
0
What is the difference between an ion and an isotope?
An ion has different number of neutrons, an isotope has a charge
An ion has a charge, an isotope has a different number of neutrons
Isotopes are averages, ions are not
they're spelled differently (don't choose this)
As electron moves away from the nucleus, it would gain
energy
momentum
desperation anxiety
a charge
What describes a particle that can be found in the nucleus?
electron
proton
neutron
nucleon
to calculate the mass number, you....
add the protons and electrons
add the neutrons plus electrons
add the protons and neutrons
look at the periodic table
To calculate the charge of an atom, you...
subtract the number of protons from the number of electrons
add the protons and neutrons
subtract the number of electrons from the number the protons
subtract the number of protons from the mass number
What determines the properties of an element?
its mass
the number of neutrons
the number of valence electrons
the number of protons relative to the number of electrons
How many valence electrons does Hydrogen Have?
1 Valence electron
2 Valence electron
3 Valence electron
4 Valence electron
5 Valence electron
How many valence electrons does Helium Have?
1 Valence electron
2 Valence electron
3 Valence electron
4 Valence electron
5 Valence electron
How many valence electrons does Potassium Have?
1 Valence electron
2 Valence electron
3 Valence electron
4 Valence electron
5 Valence electron
How many valence electrons does Silicon Have?
1 Valence electron
2 Valence electron
3 Valence electron
4 Valence electron
5 Valence electron
The elements in this group all have 5 valance electrons.
Group 5
Group 15
Group 3
Group 18
What is the atomic mass of Neon?
10
20.18
10.18
9.82
