Use the attached periodic table and ion charts to help you in your progress. They will enlarge when you click on them. When you have images on the test, you can click to enlarge them as well.
Use the attached periodic table and ion charts to help you in your progress. They will enlarge when you click on them. When you have images on the test, you can click to enlarge them as well.
According to the periodic table, how many neutrons are in a potassium atom that has an atomic mass of 41?
Use the Periodic Table of Elements to answer the following question.
Which sentence about the periodic table of elements is true?
Steel is a metal that is made from iron and carbon. During the steel making process, iron and carbon are melted, blended together, and then allowed to harden into a solid. The iron and carbon do not chemically react with each other. After steel was made, 20 samples were taken from one piece and tested. Each sample contained 98% iron and 2% carbon.
Which of the following terms best describes steel?
When magnesium (Mg) metal is burned in the presence of oxygen (O2), magnesium oxide (MgO) is produced. The properties of magnesium oxide are different than the individual properties of magnesium and oxygen because magnesium oxide is
What do the elements sulfur (S), nitrogen (N), phosphorus (P), and bromine (Br) have in common?
Which class of elements best conducts electricity?
Which of the following ordered pairs of elements shows an increase in atomic number but a decrease in average atomic mass?
Iodine would have chemical properties most like
Which of the following is the most important factor in determining an element's place in the periodic table?
The atomic number of iron is 26, and the atomic mass is 55.847. What do these numbers mean in relationship to the number of protons, electrons, and neutrons?
Refer to the portion of the periodic table to answer the question that follows.
Which element in this group would be the least likely to react with other elements?
What do all of the elements listed above have in common?
Jeanette is studying a substance. Which property of the substnace is chemical?
The table below show the physical properties of selected metals.
A cube of an unknown metal has a volume of 2.25 cm3 and a mass of 16.2 g. Based on data in the table above, what is the identity of this metal?
Which of the following trends in the periodic table should be expected as the atomic number of the halogens increases from fluorine (F) to iodine (I)?
Which of the following elements is a member of the halogen family and is located in period 3?
Which of the following statements explains why elements of the alkali metal family are highly reactive?
Which correctly lists four atoms from smallest to largest radii?
Which statement best describes the density of an atom's nucleus?
Which of the following elements can form an anion that contains 54 electrons, 74 neutrons, and 53 protons?
1s22s22p63s23p64s1 is the electron configuration for which element?
Which element has the electron configuration 1s22s22p3?
What is the Lewis dot structure for nitrogen trifluoride. (NF3)?
The table below shows the electronegativities of four elements.
Which of the following bonds is the most polar?
Which orbital notation presents an s-block element in the third period?
When salt (NaCl) is dissolving in water (H2O), what happens to the attraction between the salt ions and the oxygen atoms of the water?
Soda ash, or sodium carbonate, is used in glassmaking. It is composed of sodium ions and carbonate ions. Which of the following is the chemical formula of sodium carbonate?
The diagram below represents particles of different elements in a crystal.
What types of bond holds these particles together?
Which of the following has the greatest mass?
Which is the correct formula for aluminum oxide?
Two elements in a molecule have the same electronegativity values. Which of the following most likely holds the elements together and why?
Which of the following occurs in an ionic bond?
Carbon reacts with chlorine to form CCl4. What is the name of this compound?
Monica made a snack for her friends by putting pretzels, peanuts, and raisins together in a bowl.
Which statement describes Monica's snack?
Leroy combines magnesium (Mg) and fluorine (F). Based on the periodic table, which statement describes the interaction of these two elements?
C3H8 + O2 --> CO2 + H2O
This chemical reaction represents the combustion of propane. When correctly balanced, the coefficient for water is
A balanced chemical equation reflects the idea that the mass of the products
Copper in the compound CuSO4 can be isolated in the following reaction with iron
Fe + CuSO4 --> FeSO4 + Cu
What type of reaction is shown here?
An unbalanced chemical equation is shown below
__Pb(NO3)2 + __K2CrO4 --> __PbCrO4 + __KNO3
Which coeffcients are needed to balance this equation?
Which of the following is an example of a chemical change?
The figure below represents a reaction
What type of reaction is shown?
Solids have a definite shape and volume. This is because
How many moles of carbon-12 are contained in exactly 6 grams of carbon-12?
Which of the following shows an example of a chemical change?
Which of the following statement explains why oxygen is classified as a pure substance and air is classified as a mixture?
A substance that has a melting point of 1074 K conducts electricity when dissolved in water, but does not conduct electricity in the solid phase. The substance is most likely
Which terms describe a substance that has a low melting point and poor electrical conductivity?
Which elements are both classified as metalloids?
If the formula of the oxide of metal M is MO, what is the most probable formula of the chloride of metal M?
In an experiment, 12.0 grams of solid carbon reacted with oxygen gas to form 44.0 grams of carbon dioxide gas. How many grams of oxygen reacted with the carbon?