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chapter 1 review
atoms and molecules
Question | Answer |
---|---|
Anything that has mass and takes up space? | matter |
What matter is made up of, the building block of matter? | atom |
what is the central region of an atom? | nucleus |
what is the region surrounding the central area called? | electron cloud |
What particles does the nucleus contain? | Protons and neutorns |
what particles does the electron cloud contain? | electrons |
The number of protons in the nucleus of an atom of an element? | atomic number |
What kind of charge does an electron have? | Negatively charged |
What kind of charge does a neutron have? | uncharged |
What kind of charge does a proton have? | Positive charge |
One or more atoms of an element having the same number of protons but different number of neutrons? | isotope |
An atom that has a charge because it has gained or lost electrons? | Ion |
What is the modern model of an atom? | electron-cloud model |
What part of an atom hold the most mass? | the nucleus |
What type of ion has more protons than electrons? | positive ion |
A mixture in which substances are unevenly mixed? | heterogeneous mixture |
A mixture in which 2 or more substances are evenly mixed, but aren't bonded together? | homogeneous mixture |
Two or more atoms that are held together by chemical bonds and act a s a unit? | molecule |
Substance made of two or more elements that are chemically joined in a specific combination? | compound |
Matter with a composition that is always the same? | substance |
Matter that can vary in composition? | mixture |
Substance made of only one kind of atom? | element |
Matter is classified as? | mixture and substance |
3 examples of an element? | gold, carbon, and oxygen |
3 examples of compounds? | water,carbon dioxide, and sodium chloride |
What information is found in a compound chemical formula? | chemical symbols, subscripts,and small numbers |
What is another word for a Homogeneous mixture? | solution |
What are the parts to a solution? | solute and solvent |