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100
The amount of "substance" of an object.
What is the mass?
100
Total weight of the neutrons and protons of an atom.
What is atomic mass?
100
These have the same number of protons but a different number of neutrons.
What are isotopes?
100
These are formed when atoms bond to each other.
What is a molecule?
100
Unequal electron sharing
What are polar covalent bonds?
200
The number of protons
What is the atomic number?
200
Clouds of electrons surrounding the nucleus
What are orbitals?
200
A substance made entirely of one atom and cannot be chemically broke down.
What is an element?
200
These elements have 8 valence electrons and include neon and argon.
What are the noble gases?
200
These can be separated in water.
What are hydrophilic substances?
300
Atoms can react with other elements to create these
What are compounds and molecules?
300
The number of ____ equals the number of protons in a neutral atom.
What is electrons?
300
particle that carries a positive or negative charge because it has gained or lost electrons.
What is an ion?
300
These are the four main electrolytes found in humans.
What is us sodium, potassium, chloride, and bicarbonate?
300
Energy is released when the bond is formed.
What is exothermic reaction?
400
Trace elements that are necessary for life.
What is iron, iodine, and selenium?
400
outermost energy level of electrons and where the atoms bond
What is the valence shell?
400
Attraction between oppositely charged ions
What is an ionic bond?
400
These type of molecules are electrically balanced.
What are nonpolar molecules?
400
These are not soluble in water (can't be separated)
What are hydrophobic substances?
500
Over 90% of the body is made of these four elements.
What is Carbon, Hydrogen, Oxygen, and Nitrogen? (CHON)
500
This happens when isotopes break apart and they release energy and form less massive atoms which can break again into other elements.
What is radioactive decay?
500
These are formed when electrons are shared by different atoms
What is a covalent bond?
500
Used to store energy in the body for later release.
What are endothermic reactions?
500
This contains regions that are slightly negatively and positively charged.
What is a polar molecule?