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Physics Chapter 17
The Atomic Nature of Matter
| Question | Answer |
|---|---|
| There are slightly more than 100 known atoms that combine to form all living and nonliving matter that we know about. These atoms are called _____. | elements |
| Atoms combine together to form _____. | molecules |
| There are about as many atoms of air in our lungs at any moment as there are breaths of air in _____. | the whole world |
| If two protons are removed from an oxygen nucleus, the result is _____. | carbon |
| Elements that are above or below each other in the periodic table have one more or one less _____. | electron shell |
| Sometimes an atom has more or fewer electrons than it does protons. Such an atom is called _____. | an ion |
| The reason a granite block is mostly empty space is because the atoms in the granite are _____. | mostly empty space themselves |
| In an electrically neutral atom, the number of protons in the nucleus is balanced by an equal number of _____. | electrons |
| Solid matter is mostly empty space. The reason solids don't fall through one another is because _____. | the electrical forces |
| Two isotopes of an element have different _____. | numbers of neutrons |
| Elements that are side by side in the periodic table have one more or one less _____. | proton |
| If one neutron is added to a hydrogen nucleus, the result is _____. | dueterium |
| What normally determines whether a substance is a liquid, solid, gas, or plasma? | temperature of the substance |
| In an electrically neutral atom, the number of protons in the nucleus is balanced by an equal number of _____. | electrons |
| Solid matter is mostly empty space. The reason solids don't fall through one another is because _____. | of electrical forces |
| Matter is commonly found in three phases. These phases are solid, liquid, and ________. | gas |
| When the number of electrons does not equal the number of protons in an atom, the atom has a charge and is called | an ion |
| An isotope of an element has the same number of protons but a different number of | neutrons |
| Motion that results from the motion of neighboring atoms and molecules is known as __________. | Brownian |
Created by:
Cinda