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WorksheetsPhysical Science Unit 1 Review
Total questions: 84
Worksheet time: 2hrs 34mins
___________ have a positive charge. ____________ have a negative charge. _____________ have no charge.
electrons; protons; neutrons
protons; neutrons; electrons
neutrons; protons; electrons
protons; electrons; neutrons
The vertical (up and down) columns in the Periodic Table are called ______________ which determine the number of valence electrons an element has.
groups
towers
periods
atomic numbers
What element is represented in this Bohr Model?
Carbon
Hydrogen
Aluminum
Lithium
Why is the overall charge of an atom neutral (0)?
They have the same number of protons and neutrons.
They have the same number of protons and electrons.
They have the same number of electrons and neutrons.
The horizontal (side to side) rows in the Periodic Table are called ______________ which determine how many energy levels an element will have.
groups
families
periods
atomic numbers
The innermost energy level has a maximum of how many electrons?
1
2
6
8
How many electrons can go in the Second energy level?
2
8
18
32
How many valence electrons?
2
3
4
5
How would you draw a Lewis dot diagram for Magnesium?
What are special columns with elements that have similar properties on the periodic table called?
Groups
Families
Periods
What is the atomic number of oxygen?
8
O
Oxygen
15.999
Match the following elements to their period.
Oxygen (O)
2
Calcium (Ca)
4
Silver (Ag)
5
Francium (Fr)
7
Lead (Pb)
6
Where are electrons located in the atom?
Nucleus
Orbitals
Empty Space
Cell
Where are neutrons located in the atom?
Nucleus
Orbitals
Empty Space
Cell
Where are protons located in the atom?
Nucleus
Orbitals
Empty Space
Cell
An atom with the same number of protons but a different number of neutrons
Proton
Neutron
Electron
Ion
Isotope
An atom becomes _________ when it gains electrons.
Positive
Negative
Neutral
An atom becomes _______ when it loses electrons.
Positive
Negative
Neutral
What is a substance that cannot be broken down into simpler substances.
Pure Substance
Element
Atom
What is the smallest particle of an element
Atom
Element
Compound
What is a substance that is made from two or more simpler substance and can be broken down into those simpler substances?
Atom
Element
Compound
What is a type of mixture that the parts of the mixture are noticeably different?
Pure Substance
Heterogeneous Mixture
Homogeneous Mixture
What is a type of mixture that the substances are so evenly distributed that it is difficult to distinguish one substance from another.
Pure Substance
Heterogeneous Mixture
Homogeneous Mixture
What is a mixture that forms when substances dissolve and form a homogeneous mixture?
compound
solution
colloid
What is a heterogeneous mixture that separates into layers over time?
Suspension
Colloid
Solution
At what temperature did bread mold the slowest?
20
40
60
80
Nitrogen is important to the chemical industry. It is used to make fertilizers, dyes, nylon, and explosives. It also plays an important biological role as It is cycled naturally by living organisms through the nitrogen cycle.
Q: Which of the following elements would most likely have the same number of valence electrons as Nitrogen (N)?
Carbon (C)
Oxygen (O)
Phosphorus (P)
Helium (He)
Which pair of elements would most likely have a similar arrangement of outer electrons and have similar chemical behaviors?
boron and aluminum
helium and fluorine
carbon and nitrogen
chlorine and oxygen
All of the elements in group 2 of the periodic table are known as alkaline earth metals. These elements are all shiny and silvery-white. Models of these elements are shown.
What BEST explains their similar appearance?
the number of protons in each of the elements
the number of neutrons in each of the elements
the number of electron shells in each of the elements
the number of valence electrons in each of the elements
Based on the Table, which of these elements probably has physical and chemical properties most similar to boron (B)?
Magnesium (Mg)
Aluminum (Al)
Neon (Ne)
Chlorine (Cl)
The model shows the first three periods of the Periodic Table.
Q: Which statement BEST describes the trend in the number of protons and valence electrons across a period?
Across a period, elements gain a proton and lose a valence electron.
Across a period, elements gain a proton and gain a valence electron.
Across a period, elements lose a proton and gain a valence electron.
Across a period, elements lose a proton and lose a valence electron.
Coompared with particles of matter in the solid phase, particles of matter in gaseous phase _______Choose two answers
are less compressible
have less kinetic energy
have more kinetic energy
are more compressible
Label the phase change diagram: #4 only
Freezing
Melting
Condensation
Evaporation
None
The subatomic particle(s) responsible for giving an element its identity is the —
Neutrons
Electrons
Protons
Nucleus
Select all the true statements about the atoms.
Atoms are the smallest unit of an element.
Electrons are the subatomic particles that surround the nucleus.
Neutrons are the subatomic particles inside the nucleus of an atom.
An atom is composed of a nucleus containing electrons and protons.
When moving across a period or down a group, the atomic mass increases. This trend can be explained by the —
protons increasing in mass as the atomic mass of the atom increases
addition of electrons to the atomic nucleus
addition of protons to the atomic nucleus
electrons increasing in mass as the atomic mass of the atom increases
An object has a density of 1.4 g/cm3. It is slowly lowered into a graduated cylinder whose water level was 65 mL. When the object is completely submerged the water level rises to 90 mL. What is the mass of the object?
25 g
15 g
35 g
18 g
When an object is immersed in a fluid, it pushes the fluid out of the way and takes its place. This is ...
Gravity
Buoyancy
Density
Displacement
(Charles Law) There are 65 liters of helium in a balloon at 35 K. If the temperature of the balloon is increased to 40 K, what will the new volume of the balloon be?
40 L
70 L
74.3 L
75.9 L
(Don’t forget about what must be done to temperatures!)
How many valence electrons are found in atoms of group 14?
4
3
14
16
What are valence electrons?
The total number of electrons in an atom
The number of electrons in the outermost shell
The number of electrons in the second shell
The number of protons in the outermost shell
Which elements have the most similar chemical properties?
boron and carbon
oxygen and sulfur
aluminum and bromine
argon and silicon
All atoms are most stable with (or would "prefer") how many electrons in their valence shell?
1
2
8
18
When trying to identify an unknown element, a scientist determines what other elements reacts with chemically. Which property of the unknown element determines the other element it reacts with?
The total number of neutrons in the unknown element
The total number of particles in the nucleus of the unknown element
The number of protons in the nucleus of the unknown element
The number of valence electrons in the unknown element
What group is the most reactive metals?
2
18
1
16
What group is the most reactive non metals?
1
17
2
1
Why are halogens so reactive?
They want to get rid of their only valance electron
They only need one more electron
They are non reactive, they have a full shell
How many valence electrons does carbon have?
4
5
6
7
Appear Vertically on the periodic table
Periods
Groups
Energy Levels best describe .....
Periods
Groups
Elements that are similar in chemical reactivity
Periods
Groups
Valence Electrons are organized into .......
Periods
Groups
Families on the Periodic table are organized into .....
Periods
Groups
A ___ change causes the substance to change to a new substance with different properties.
Physical
Chemical
A ____ change only changes the look of the substance but NOT the chemical make-up.
Physical
Chemical
Water + Kool-aid Powder.
Is it a physical or chemical change?
Physical
Chemical
Choose all of the following that are PHYSICAL changes.
Choose all of the following that are CHEMICAL changes.
This change is a
chemical reaction
physical change
musical change
Ice Ice baby
