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What is the mass of the Chlorine gas?
2NaCl + F2 ➜ 2NaF + Cl2
5.4g + 3.2g = 4.9g + ____g
In the equation for burning magnesium (2Mg + O2 -> 2MgO) what are the products? (a)
In what state of matter are the atoms moving the slowest? (a)
How does adding heat affect liquid water?
it becomes a solid
its molecules move faster
new substances form
a color change is produced
What is the symbol for Hydrogen? (a)
What is a positivly charge atom called? (a)
What is a negatively charged atom called? (a)
What is a valence electron?
an electron that is found in the outermost shell of an atom.
an electron found in the innermost shell of an atom.
an electron found in the middle shell.
What are the reactants in the chemical equation pictured?
CH4 and CO2
CH4 and O2
CO2 and H2O
O2 and H2O
How many valence electron does Beryllium have?
Which subatomic particle has NO CHARGE? (a)
Which subatomic particle has a POSITIVE charge? (a)
Which subatomic particle has a NEGATIVE charge? (a)
Which subatomic particle tells you the identity of the Element? (a)
What is the name for this group of elements?
In the formula 2C6H12O6, what is the Coefficient?
Anything that has mass and takes up space.
This could be the dot diagram of (a)
Balanced or Unbalanced? (a)
How does thermal energy play a role in particle motion and changes of state?
Thermal energy is a term that refers to temperature
Increasing an object's thermal energy increases particle motion and can cause a change of state.
Decreasing an object's thermal energy increases particle motion and can cause a change of state.
Thermal energy is the energy added from a heat source.
How many oxygen atoms are in this chemical formula?
6 oxygen atoms
2 oxygen atoms
3 oxygen atoms
4 oxygen atoms
Ions form because atoms either gain or lose
Evidence that a chemical reaction has occurred includes which of the following?
change in color
sudden temperature change
formation of a precipitate
a change of state
The most reactive metals are in which group?
The Alkali Metals
The Alkaline Earth Metals
The Boron Group
The Transition Metals
In an endothermic reaction, heat is ...
A substance that increases the rate of a reaction without being used up during the reaction is called a