An answer to the question based on research and observations
What is hypothesis?
100
just name the metal (cation) first and name the nonmetal (anion) with the ending changed to -ide, second
What is rule for naming metallic ions?
100
Convert 578 mg to grams
What is .578 grams
100
Noble gases are generally non-reactive because they already have a complete valence shell
True or False
What is true about forming ions?
100
hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, iodine all form bonds with themselves in nature.
What are the seven diatomic molecules?
200
A family wants to test the effectiveness of a misting showerhead in conserving water. They place a large tub at the bottom of the shower. With the old showerhead in place, they turn the shower on full force for one minute. They measure the volume of water. They then replace the showerhead with the new misting showerhead and repeat the procedure.
A standard for comparison that helps to ensure that the experimental result is caused by the condition being tested is the ____.
What is the control? The original showerhead.
200
lithium bromide, LiBr
What is the name of a compound made up of lithium and bromine?
200
type of measurements like time, mass, length, and temperature
Which is a quantitative measurement?
200
When an atom gains electrons, it becomes positively charged
true or false
What is false about gaining and losing electrons?
atoms that gain electrons become negative ions.
200
solid - molecules are slow and fixed position, liquid - molecules move medium and they can slip past each other, gas - molecules move fast and random and plasma - highest energy with hyper movement
What are the states of matter with distinguishing molecule movement?
300
A family wants to test the effectiveness of a misting showerhead in conserving water. They place a large tub at the bottom of the shower. With the old showerhead in place, they turn the shower on full force for one minute. They measure the volume of water. They then replace the showerhead with the new misting showerhead and repeat the procedure.
A factor in an experiment that changes from the manipulation of the independent variable is the ____.
What is dependent variable? Volume of water.
300
use the roman numeral for the oxidation number of the metal cation. example: Fe +2 is iron (II), where Fe+3 is iron (III)
What is the rule for naming transition metals?
300
Subscripts
In a chemical formula, the number of each type of atom in the compound is shown by numbers called ____.
300
In an ionic bond, two cations can bond together to form a compound.
true or false
What is false about ionic bonding?
must be a positive and a negative ion to form a bond
300
mixtures that have a uniform composition throughout versus mixtures that are not.
What is distinguishing between homogeneous and heterogeneous mixtures?
400
A family wants to test the effectiveness of a misting showerhead in conserving water. They place a large tub at the bottom of the shower. With the old showerhead in place, they turn the shower on full force for one minute. They measure the volume of water. They then replace the showerhead with the new misting showerhead and repeat the procedure.
A factor that is manipulated in an experiment to change the dependent variable is the ____.
What is independent variable? misting showerhead.
400
Al2S3
What is the formula compound for aluminum sulfide?
400
An object has a mass of 26.94 grams and a volume of 2.568 cubic centimeters. calculated to be 25.5g / 5.5cm3 = 4.64 g/cm3
What is the density of an object?
400
nonmetal form anions or negative ions. example: nitrogen, oxygen, fluorine, sulfur
Which of the following elements will likely form a negative ion in its ionic compounds?
400
Burning a piece of paper versus cutting a piece of paper
What is chemical versus physical change?
500
A family wants to test the effectiveness of a misting showerhead in conserving water. They place a large tub at the bottom of the shower. With the old showerhead in place, they turn the shower on full force for one minute. They measure the volume of water. They then replace the showerhead with the new misting showerhead and repeat the procedure.
The part of the experiment that stays the same, is the ____
What is constant? water pressure, time
500
halogens form bonds with 1-to 1 ratio
What family of elements will form ionic bonds with alkali metals, in a 1-to-1 ratio, alkali metal to other element?