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causey2
bio
| Question | Answer |
|---|---|
| Organisms are composed of molecules, which are collections of smaller units, called | atoms |
| Negatively charged particles of atoms with almost no mass are called | eclectrons |
| Elements that have atoms with the same atomic numbers but different number of neutrons are called | isotopes |
| In chemical reactions, the gain of an electron is called | reduction |
| When two atoms share a pair of electrons, the bonding is referred to as | covalent |
| Water molecules are polar ends that exhibit partial positive and negative charges. Such opposite charges make water molecules attract each other through bonds called | hydrogen bonds |
| Which of the following statements about electrons is false | electrons are always found in the nucleous of the atom |
| The atomic number of an element is equal to the number of | protons only |
| Which of the following is not one of the four most abundant atoms found in living things | phosphorus |
| Because oxygen is more electronegative than hydrogen, the water molecule is | polar |
| Water is extremely important in living things for all of the following reasons except | it is an excellent buffer |
| You have recently discovered a new element, and find that this particular element has seven electrons in its outer energy level. What does this information tell you about the reactivity of this element | the element is highly reactive |
Created by:
gabriley11
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