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3.2- 7th grade
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1.
1 point
________ is anything that has mass and takes up space.
Answer:
2.
1 point
Emotions, thoughts, and ideas are not _______ either.
Answer:
3.
1 point
The term _____ comes from a Greek word that means "cannot be divided."
Answer:
4.
1 point
_______________, a French chemist who lived about 2,000 years after Democritus, also was curios about matter-- especially when it changed form.
Answer:
5.
1 point
__________ thought he could design an atomic model that explained the results of those experiments.
Answer:
6.
1 point
____________ knew that like charges repel each other and opposite charges attract each other.
Answer:
7.
1 point
In _______, Thomson received the Nobel Prize in physics for his work on the discovery of the electron.
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8.
1 point
Thomson's model , can be compared to _________ chips spread throughout a ball of cookie dough.
Answer:
9.
1 point
Rutherford called the positively charged, central part of the atom the ___________.
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10.
1 point
An _______ is matter made of only one kind of atom.
Answer:
11.
1 point
At this time, _____ elements are known and 90 of them occur naturally on Earth.
Answer:
12.
1 point
Some _________ elements have important uses in medical testing and are found in smoke detectors and heart pacemaker batteries.
Answer:
13.
1 point
Chemists have created a called the _______ table of the elements to help them organize and
Answer:
14.
1 point
There are rows and ______ that represent relationships between the elements.
Answer:
15.
1 point
The elements in each group have similar ________ related to their structure.
Answer:
16.
1 point
____ is the symbol for chlorine.
Answer:
17.
1 point
The top number is the element's _____ number.
Answer:
18.
1 point
It tells you the number of _______ in the nucleus of each atom of that element.
Answer:
19.
1 point
What is the atomic number for NA?
Answer:
20.
1 point
They are called __________, which are atoms of the same element that have different number of neutrons.
Answer:
21.
1 point
An atom's ______ ______ is the number of protons plus the number of neutrons it contains.
Answer:
22.
1 point
The ______ ________ is the weighted average mass of the isotopes
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23.
1 point
The calculation of atomic mass takes into account the different isotopes of the _________.
Answer:
24.
1 point
____ generally have a shiny or metallic luster and are good conductors of heat and electricity.
Answer:
25.
1 point
Metals are also ______, which means they can be drawn into wires without breaking.
Answer:
26.
1 point
____________ are elements that are usually dull in appearance.
Answer:
27.
1 point
__________ are elements that have characteristics of metals and nonmetals.
Answer:
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