If something is MATTER it must have a _____ and a take up ___________
have a MASS and take up SPACE (volume)
100
What subatomic particles contribute to the MASS of an atom?
Protons and Neutrons
100
What is the name of column 7A.
Are most of these elements solids, liquids or gases?
Halogens - gases!
100
How many chloride atoms are in MgCl2
2
100
A substance that cannot be broken down into any other substances by chemical or physical means is called an _____________________.
Element
200
Matter that has a definite shape and a definite volume is known as a
Solid!
200
An atom has 4 protons, 3 neutrons and 4 electrons.
What is its mass (amu)?
7 amu
200
A substance made from two or more substances – elements, compounds, or both – that are in the same place but are not chemically combined is called a ___________________.
Mixture
200
During a chemical reaction, atoms cannot be ....
created or destroyed
200
Is Hydrogen a metal, nonmetal or metalloid
Nonmetal
300
List 3 physical properties of a golden necklace
solid, gold color, malleable, shiny, hard, certain mass, certain volume, smooth
300
If an atom has more protons than electrons, will its charge be NEUTRAL, POSITIVE or NEGATIVE?
explain your thinking
POSITIVE
300
List the family and for Argon
noble gases (8A)
period 3
300
What are 3 signs that a chemical reaction may have occurred?
color change, gas is produced, solid is formed, smoke, burning,
300
What is the formula for Sodium Chloride?
NaCl
400
Regardless of the size of the samples, density is the same for the same substance.
Density.
400
Draw a sketch of JJ Thompson's plum pudding model of the atom (the chocolate chip cookie model).
List 2 major differences between JJ's model and the more current model of the atom
JJ didn't know there was a nucleus. JJ didn't know about protons or neutrons
400
What is the least reactive alkali METAL?
lithium
(hydrogen is not a metal!)
400
A block of gold melts at almost 200 degrees Fahrenheit. Jewelers have large ovens in which they can melt gold to fill molds.
When jewelers melt gold into liquid form, are they performing a chemical reaction? Explain your answer
NO! Phase changes are only physical changes. The atoms are not rearranged, they are just moving faster
400
Which side of the periodic table are the nonmetals on? ___________________
Right
500
A characteristic that is observed when a substance interacts with another substance.
Chemical Property
500
An atom has a mass of 44. It contains 21 electrons. It has an overall charge that is neutral.
How many protons and neutrons does this atom contain?
21 protons.
23 neutrons.
500
A change that alters the form or appearance of a substance but does not make the material into another substance
Physical Change
500
A characteristic of a substance that can be observed without changing the substance into something else.
Physical Property
500
How many periods and groups are there on the periodic table?