PC1.1 Review and Practice

Last updated 10 months ago

9 questions

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Chemical Formula Practice

PC1.1 Review and Practice

Last updated 10 months ago

9 questions

Untitled Section

In each region of the periodic table, place the correct description of the elements near the label.

Decide whether each picture represents an element, a compound and or a molecule. Be sure to use your periodic table to determine whether collections of atoms has metallic or nonmetal elements in it. There are pictures that can go in multiple categories.

Chemical Formula Practice

In the questions, below use the math editor to type in the number of atoms (for example -2) or the equation using the coefficients and subscripts to is used to calculate the total number of atoms in the group ( for example - 6x2=12).

Hg₇O₄ means that for every _______ mercury atoms, there are _______ oxygen atoms. The total number of mercury atoms in the group is _______ and the total number of oxygen atoms is _______ .

6Au₂S₃ means that for every _______ gold atoms, there are _______ sulfur atoms. The total number of gold atoms in the group is _______ and the total number of sulfur atoms is _______ .

9Pb₅Cl₇ means that for every _______ lead atoms, there are _______ chlorine atoms. The total number of lead atoms in the group is _______ and the total number of chlorine atoms is _______ .

 3Ag₄C means that for every _______ silver atoms, there are _______ carbon atoms. The total number of silver atoms in the group is _______ and the total number of carbon atoms is _______ .

Match the diagram with the correct formula unit. The formula unit is sometimes known as the empirical formula since it reflects the ratios of the atoms of each element in the sample. Empirical in this case means something measured.

Draggable item		Corresponding Item
		CH₃O
		C₂H₅O₂
		C₃H₅O₃

Match the diagram with the correct chemical formula for each group of atoms.

Draggable item		Corresponding Item
		3Fe₂O₆H₃
		12Fe₃O₂H₃

Draggable item		Corresponding Item
Solid that appears in liquid during a chemical reaction		Precipitate
chemical formula		smallest repeating group of atoms in a compound
molecule		describes the ratio of a particular element in the compound or molecule to the other elements
diatomic		the number of formula units in a collection of atoms
compound		a chemical symbol that describes the number of atoms of each element in a group of atoms
physical property		elements that always are found as a group of two atoms
Formula Unit		elements that can be found as a single atom
element		how or whether a substance reacts with another substance
coefficient		anything that you can measure to characterize a substance
alloy		when more than one compound is present
chemical property		two or more elements in a specific ratio
monoatomic		one or more nonmetal elements in a specific ratio
subscript		a group of atoms with the same chemical properties
mixture		two or more metal atoms in a specific ratio

PC1.1 Review and Practice

PC1.1 Review and Practice

Decide whether each picture represents an element, a compound and or a molecule. Be sure to use your periodic table to determine whether collections of atoms has metallic or nonmetal elements in it. There are pictures that can go in multiple categories.

Match the diagram with the correct formula unit. The formula unit is sometimes known as the empirical formula since it reflects the ratios of the atoms of each element in the sample. Empirical in this case means something measured.

Match the diagram with the correct chemical formula for each group of atoms.

Match the definitions with the vocabulary term.

Decide whether each picture represents an element, a compound and or a molecule. Be sure to use your periodic table to determine whether collections of atoms has metallic or nonmetal elements in it. There are pictures that can go in multiple categories.

Match the diagram with the correct formula unit. The formula unit is sometimes known as the empirical formula since it reflects the ratios of the atoms of each element in the sample. Empirical in this case means something measured.

Match the diagram with the correct chemical formula for each group of atoms.