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chapter 1 lesson 2
atoms and molcues
| Question | Answer |
|---|---|
| opposite of part | whole |
| opposite of substance | mixture |
| opposite of positive | negative |
| opposite of proton | electron |
| opposite of heterogeneous | homogeneous |
| opposite of individual | multiple |
| opposite of solvent | solute |
| opposite of element | compound |
| opposite of bond | detach |
| positively charged particle in the nucleus of an atom | proton |
| region surrounding an atom's nucleus where one or more electrons are often found | electron cloud |
| negatively charged particle that occupies the space in an atom outside the nucleus | electron |
| one or more atoms of an element having the same number of protons but a different number of neutrons | isotope |
| region at center of an atom that contains most of the mass of an atom | nucleus |
| an atom that has a charge because it has gained or lost electrons | ion |
| the number of protons in the nucleus of an atom of an element | atomic number |
| uncharged particle in the nucleus of an atom | neutron |
| the nucleus of an atom contains ______________ and neutrons | protons |
| the nucleus has a _____________ and the __________ of the atom | positive charge and most mass |
| an electron is ___________ particle located outside the nucleus | negatively charged |
| the modern model of an atom is called the _______ model | electron-cloud |
| electrons that are close to the nucleus have _______ than electrons that are farther from the nucleus | less energy |
| to atomic number is the number of ________ in the nucleus of an atom of an element | proton |
| isotopes have the same number of protons but different numbers of _________ | neutrons |
| an ion has charge because it has gained or lost __________ | electrons |
| a ________ ion has more protons than electrons | positive |
| adding an __________ to a neutral atom produces a new element | proton |
| which particle in an atom has a positive charge | proton |
| which particle in an atom has no charge | neutron |
| which particle in an atom has a negative charge | electron |
| where is most if the mass of an atom found | nucleus |
| the _______________ is the number of protons in the nucleus of an atom of an element | atomic number |
| you can identify an element if you know its atomic number or _______________ | the number of protons |
| in the periodic table, the atomic number of an element is the __________ above its symbol | whole number |
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carreali2911
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