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STAAR WARS- CHEMISTRY Flashcards | StudBud

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STAAR WARS- CHEMISTRY

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8th grade chemistry. Basic periodic table

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Questions 10

Answers

1
The mass of a proton is roughly equal to the mass of..
A main sequence star
A positron
An electron
A neutron
2
A compound is...
Two elements that have the same atomic numbers
Two different elements that share the same number of protons
Two or more of the same element bonded together
Two or more different elements bonded together
3
Which of the following is NOT a property of a non metal?
Poor conductor
Ductile
Brittle
Dull
4
What do elements in the same group have in common?
Same number of valence electrons
Same number of protons
Same number of energy levels
Same number of electrons
5
In a chemical equation, what must be true?
Reactants must be greater than products
Reactants must equal products
Products must be greater than reactants
What are reactants and products?
6
when looking at a chemical formula, what does the subscript tell you?
Ms. Reynolds, we never learned this
How many submarines are present
Number of compounds present
Number of atoms of an element present
7
How many valence electrons must an element have to be stable?
13
6
8
9
8
Which atomic particle has a negative electric charge?
Negatron
Neutron
Proton
Electron
9
There are 4 signs that indicate a chemical reaction occurred. Which is NOT one of those signs?
Unexpected color change
Gas formation
Solid precipitate
Dissolving
10
Which groups are the most reactive?
8
3 & 5
1 & 7
4 & 7