When an atom loses an electron, it becomes__________.
What is positive?
100
The SI unit for mass
What is gram or kilogram?
200
A possible explanation to a problem or question.
What is a hypothesis?
200
The closeness of a measurement to its true value is its...
What is accuracy?
200
The official SI unit for temperature.
What is Kelvin?
200
Any element in group 13 will contain ______ valence electrons.
What is 3?
200
Scientists ____________ when they cannot obtain exact numbers.
What is estimate?
300
A student conducted an experiment on which flavors of cake went best with which flavor of punch. This experiment featured ________________ data.
What is qualitative?
300
The measurement of how much mass is contained in a given volume is.
What is density?
300
_____________________ shows how the responding variable changes in response to the manipulated variable.
What is a line graph?
300
This group of metals is the most reactive.
What is alkali metals?
300
The volume of a regular solid with measurements of 9 cm long, 11 cm high, and 2 cm wide.
What is 198 cm3?
400
A teacher predicted that her students would do better on a test if she gave them candy while they were testing. This is which step of the scientific method?
What is the hypothesis?
400
When a metal can be rolled into thin sheets or beaten into complex shapes.
What is malleable?
400
An irregular solid displaces 17 mL of water. Its volume is________________.
What is 17 cm3?
400
An element with an atomic number of 34 and an atomic mass of 78.971 would have_____ neutrons.
What is 45?
400
The amount of meters in one Decameter?
What is 10?
500
During an experiment, you purposely change shoes to see which ones look best with the shirt you are wearing. The shirt is the ___________________ variable.
What is the dependent variable?
500
A chemical bond formed when two atoms share electrons?
What is a covalent bond?
500
A metal washer has a mass of 5.4 g and a volume of 2 cm3. Its density is_________________.
What is 2.7 g/cm3?
500
This is the type of chemical bond that exists between an atom of Beryllium and an atom of Potassium?
What is metallic?
500
The atom Thorium has an atomic number of 90 which means it has 90 protons. It also has ______________ neutrons.