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

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