States of Matter
What are the 4 main states of matter?
Liquid, solid, gas, and plasma
What is the Scientific Method?
A step-by-step process used to answer questions or solve a problem
what is an anion
A negatively charged ion
what element has the symbol Na
sodium
In order to have an isotope, you must change this in an element.
number of neutrons
What do you call when a liquid turns into a gas?
Evaporation
What is another word for an educated guess?
Hypothesis
Elements become ions by losing these.
electrons
what element has the symbol K
Potassium
The average mass of all the element's isotopes.
atomic mass
What is the melting point of ice?
0 degrees
Which of the following steps is completed last?
A. collecting data
b. conclusion
c. testing a hypothesis
conclusion
How do anions form?
Gaining electrons
Non metals are mostly....
Gasses
What is an isotope?
An isotope is an element that has 2 or more different atoms with the same number of protons but different numbers of neutrons.
Which states of matter take the shape of their container?
Liquids and gas.
What is the 1st step to the scientific method?
Ask a Question
Neutral atoms don't ____ or ____ each other
Attract or repel
Name this classification: DULL, BRITTLE, MALLEABLE
metalloid
Does the atomic number change in isotopes?
No, the atomic number does not change because isotopes of the same element have the same number of protons.
What is the opposite of evaporation?
Condensation.
This always stays the same in an experiment.
the controlled variable
What is a cation?
A positively charged ion
what is the series of steps designed to help you solve problems and answer questions called?
scientific method
Does the mass number change in isotopes?
Yes