Atoms and Elements
Kinds of Changes
Metals, Non-metals, and Metalloids
Classifying Matter
Atomic Mass or Number and solving equations
100
What are basic units that make up all matter?
Atoms
100
What change may change the appearance or form of the matter, but it’s the same element or compound that it was before the change occurred?
A physical change
100
What are elements that lack the properties of metal?
Nonmetals
100
What is anything that takes up space and has mass and is almost everything except for energy?
Matter
100
What is the atomic number of Aluminum?
13
200
What is a subatomic particle with a negative charge?
electron
200
Which change transforms matter into one or more new substances?
A chemical change
200
Between metals, nonmetals, and metalloids, which one has a high malleability?
metal
200
What is any matter with a definite composition and characteristic property?
A substance
200
What is the average atomic mass of Gold? (in a.m.u.)
196.97 a.m.u.
300
What is a horizontal row across the periodic table?
period
300
Which of these choices is NOT a sign of a chemical change? ( put the number only!)
1. Formation a precipitate
2. Temperature change
3. Change in the state of matter ( solid, liquid, gas)
4. Color change
3.
300
What is an extremely reactive group of metals, found in group 1, that are always found in a compound in nature?
Alkali Metals
300
What are two or more atoms that are chemically combined?
Molecules
300
In a chemical equation, what tells you the number of atoms in each element, in each molecule?
the subscript
400
What are atoms of the same element with a different number of neutrons?
Isotopes
400
Liquid H2O -> solid H2O is what type of change?
Physical change
400
What is the name of the group that does not react with anything and is made up of gases?
Noble Gases
400
What type of mixture is a smoothie?
Heterogeneous
400
What can be used to represent a chemical reaction, using symbols and chemical formulas?
Chemical equation
500
Between Groups 2, 17, and 18. Which Group will react violently to Group 1?
Group 17
500
What type of change is a piece of bread toasting?
Chemical change
500
In which group would you put Hydrogen (H) ? ( Metals, nonmetals, and metalloids)
Non- metals
500
What order for obtaining salt from a mixture of salt and sand is correct? (put the number only!)
1. evaporate, filter, then add water
2. Add water, filter, then evaporate
3. Filter, evaporate, then add water
2.
500
When balancing this equation, what coefficient has to be put in front of the first Al?
4