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Cp chem final exam practice
Terms in this set (175)
Which nonmetallic element would be the most chemically active? out of Phosphorus• Sulfur• Chlorine • Argon
Which nonmetallic element would be the most chemically active? out of Fluorine • Chlorine• Bromine• Iodine
Which metallic element would be the most chemically active? out of Rubidum • Strontium• Indium• tin
Which metallic element would be the most chemically active? out of
• Potassium• Cesium • Sodium• Rubidium
Which of the following would have a higher electronegativity?
• Nitrogen • Phosphorus• Arsenic
Which of the following has a higher electronegativity?
• Chlorine • Aluminum• Sodium
Which of the following has the largest atomic radii?
• Helium• Xenon• Strontium
Which of the following has the largest atomic radii?
• Cesium • Tin• Argon
Which of the following has the largest atomic radii?
• Potassium • Calcium• Scandium
Tell the block that Bromine is located in.
• s• p • d• f
Tell the block that Cobalt is located in.
• s• p• d • f
What is the volume occupied by 40 grams of argon gas (Ar) at STP?
• 896 liters• liters• 22.4 liters• 1 liter
How many molecules are contained in 3 moles of water,?
• 54 molecules• 3x 10^23 molecules• 6 molecules• 2x 10^24 molecules
2x 10^24 molecules
What volume is occupied by 4.00 moles of oxygen gas at STP?
• 72.0 liters• 5.62 liters• molecules• 2.4x 10^24
How many molecules of ethane gas, are in 15 grams of ethane?
• 0.5 molecules• 3.0x 10^23molecules • 45 molecules• 2.0 molecules
What is the mass in grams of 3.0 moles of water, ?• 6.0 grams• 54 grams• 21 grams• 0.16 grams
1 mole of any gas = ______L at STP (Standard Temperature and Pressure)?• 11.2• 22.4 • 44.8• 67.2• 89.6
A student determines measures the mass of one mole of carbon and finds it to be 12.22 grams. If the accepted value is 12.11 grams, what is the students % of error.
• 0.0091%• 0.091%• 0.91% • 9.1%
Across a period in the periodic table, atomic radii
• gradually decrease • gradually decrease, then sharply increase• gradually increase• gradually increase, then sharply decrease
A positive ion is known as a(n)
• ionic radius• valence electron• cation. anion
The elements in Group 1 are also known as the
• alkalai metals • rare-earth metals• Period 1 elements• actinide series
Place the following atoms in order of increasing ionization energy:C, N, and Si.
Si < C < N
Place the following atoms in order of increasing atomic radii:Se, O, S, and As.
O < S < Se < As
To which group of the periodic table do fluorine and chlorine belong
When an atom becomes a negative ion, it
When an atom loses electrons, it
A negative ion is known as a(n)
The element that has the greatest electronegativity is
The energy required to remove an electron from an atom is the atom's
Bromine, atomic number 35, belongs to group 17. How many electrons does bromine have in its outermost energy level?
The periodic law states that
the physical and chemical properties of the elements are functions of their atomic numbers
Argon, krypton, and xenon are
Mendeleev predicted that the spaces in his periodic table represented
Mendeleev noticed that properties of elements usually repeated at regular intervals when the elements were arranged in order of increasing
To which group of the periodic table do lithium and potassium belong?
All of the following are properties of nonmetals except
most elements are
Which of the following is the most reactive alkaline earth metal in this list? Cs• U• Cu• Ag• Au• Mg• Sr• Ba
Which of the following is the least reactive or most stable element? Cs• Co• O• Ne • I
What is the charge on an element that has 8 protons, 8 neutrons, and 6 electrons?
what is the most common oxidation number (charge) of Calcium?
Which is an alkaline earth metal with the lowest electronegativity?
• Li• Cs• Be• Ba • I
Which nonmetallic element would be the most chemically active?
• Fluorine • Chlorine• Bromine• Iodine
Which of the following has the largest atomic radius?
• Helium• Sodium• Strontium • Calcium
An electron that is in the highest energy level of an atom and determines the atom's chemical properties is called a(an)
Waves with the shortest wavelength & the highest energy in the EM spectrum are
Which color of the visible light spectrum has the shortest wavelength?
A wavelength on these waves would be measured
from crest to crest
Which color of the visible light spectrum has the longest wavelength?
The waves with the longest wavelengths of the EM spectrum are
Electrons on the outermost energy level of an atom are the
Dalton's model of an atom is best described as
An atom has no net electrical charge because
the positively charged protons cancel out the negatively charged electrons
An atom with a positive or negative charge is called a(an)
The number of protons in an atom will be equal to the number of _______.
most of the atom is
The particles with no charge in an atom are the _______.
What is the atomic number of a Cl atom which has 17 protons and 18 neutrons?
What is the mass number of a Cl atom which has 17 protons and 20 neutrons?
Na atom has 11 protons and a mass number of 23. What is the number of neutrons in an atom of Na?
U atom has an atomic number of 92 and mass number of 235. The number of protons in an atom of U is ____.
The atomic number of P atom is 15. Its mass number is 31. The number of neutrons in an atom of P is ____.
Isotopes of atoms contain...
different number of neutrons
Which of the following are isotopes?
• U-235, Br-81• Mg-12, Mn-55• Cl-35, Cl-37 • H-1, H-1
Isotopes of an element have a different number of ____________.
J. J. Thomson discovered particles that are today called _ which he said were mixed up inside the atoms.
Electrons are particles that have a _ charge.
the nuclues has a ______ charge
The gold foil experiment performed by Rutherford proved
there is a nucleus at the center with electrons on the outside
What would be the correct number of each subatomic particle of an isotope of potassium that has a mass of 41?
p =19 e= 19 n= 22
Which element has 45 protons?
What volume would a 0.871 gram sample of air occupy if the density of air is 0.0129 g/mL?
If an atom were composed of 3 protons, 4 neutrons, and 2 electrons, it would have
an atomic number of 3 and an atomic mass number of 7
N atom has 7 protons and a mass number of 14. What is the number of neutrons in an atom of N?
Which universal force holds the protons together in the nucleus?
the nuclear forces
How many protons are in Ca +2?
What are the units for measuring the density of a liquid?
If olive oil has a density of 0.9200 g/mL, what is the volume of 285.0 g of olive oil?
What is the density of a 48.0 g sample of metal if the level of water in a graduated cylinder rises from 25.0 mL to 33.0 ml after the metal is added?
A gold-colored ring has a mass of 18.9 grams and a volume of 1.12 mL. What is the density of the ring?
An atom of Magnesium has an atomic number of 12 and has a mass number of 25. Which one correctly indicates the correct number of protons, neutrons and electrons?
12 p, 13 n, 12 e
Substances with a density __________1 will sink in water.
what is the density equation?
Of the following 3 elements, which is a metalloid - Si, Na, Cl
The elements in Group 18 are called the "Noble Gases" because
they are nonreactive & inert
The term ductile means
can be drawn into wire
One way to separate the different kinds of matter in a mixture is through
.0025648 has how many significant figures
.000023 has how many significant figures
1.0025 has how many significant figures
The value 28.06 liters has ___ significant figure(s
The value 0.000006 grams has ___ significant figure
The value 0.0144030 kilograms has ___ significant figure
The value 1002 milliliters has ___ significant figure
The metric system is based on what number?
The standard metric unit for length is the _____.
We use the metric unit Liter to measure which of the following?
1.06 liters of ethanol is the same as _____ of ethanol.
0.25 grams is the same mass as _____.
1 gram is the same mass as _____ milligrams.
30 milligrams is the same mass as _____.
The daily requirement of vitamin C is 60 milligrams. This would equal _____ grams.
26.5 meters = _____ millimeters
Written in scientific notation, the measurement 852 mm is
8.52 x 10^2 mm
Written in scientific notation, the measurement 23500 g is
2.35 x 10^4 g
Written in scientific notation, the measurement 0.050 mL is
5.0 x 10^-2 mL
The number 4.23 X 10^23 is written in scientific notation. How would it be written in standard notation?
4.089 x 10^7 would be __ in scientific notation
The number 0.0053 converted into scientific notation would read ___.
5.3 x 10^-3
Vertical columns of elements on the Periodic Table are called _____________.
The elements to the right side of the periodic table are ________.
The elements to the left side of the periodic table are ______.
Horizontal rows in a periodic table are called ____.
Based on its location on the periodic table, you could infer that ______ is very unreactive.
Using the periodic table, which element has properties most similar to those of sodium?
There are_________periods on the periodic table.
The term malleable means:
can be hammered into sheets without cracking or breaking
A chemical change ALWAYS
forms one or more new substances
Copper turns green when exposed to the environment.
A candle melting.
Baking soda reacts with vinegar and forms a gas.
Water freezes to form ice.
The substances that undergo change in a chemical reaction are called
Which of the following changes is a chemical change of matter?
vinegar combining with baking soda to produce carbon dioxide
Classify the following as a physical property, physical change, chemical property, or chemical change:Density
Determine whether the following is an intensive or extensive property:Volume
Determine whether the following is an intensive or extensive property:Color
Determine whether the following is an intensive or extensive property:Melting Point
A substance formed by the chemical union of 2 or more elements in a definite ratio.
Physical means can be used to separate _____.
Which of the following is best classified as a homogeneous mixture?
All pure substances
have a fixed composition
Gas to liquid
Liquid to gas
solid to gas
gas to solid
liquid to solid
solid to liquid
This state of matter has a fixed volume and shape.
This state of matter has a fixed volume but takes the shape of its container.
Which states of matter are fluid?
liquids and gases
In ionic bonding if Al reacts with Cl, the correct formula for this compound would be:
Which of the following is related to ionic bonding?
opposite charged ions attract each other
Name the following compound: LiF
What is the following chemical formula after sodium and bromine bond ionically?
What is the following chemical formula after magnesium and sulfur bond ionically?
How many valence electrons does Al have?
How many valence electrons does Cl have?
Compared with ionic compounds, molecular compounds
have lower melting points
Which of the following is NOT a property of an ionic compound?
low boiling point
The chemical formula for an ionic compound represents the
simplest ratio of the combined ions that balances total charge
A chemical bond resulting from the electrostatic attraction between positive and negative ions is called a(n)
What is the molar mass of NaCl.
What is the molar mass of Al2O3?
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