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2019 CH 4 Review
periodic table and atoms
| Question | Answer |
|---|---|
| part of atom with positive charge | protons |
| part of atom with no charge | neutron |
| part of atom with negative charge | electron |
| protons and neutrons are found here in atom | nucleus |
| electrons are found here in atom | electron cloud |
| change in number of protons | different element |
| change in number of electrons | ion |
| change in number of neutrons | isotope |
| sum of protons and neutrons | atomic mass |
| the number of protons only | atomic number |
| smallest particle of element that keeps its identity in a chemical reaction | atom |
| only made of 1 type of atom | element |
| created first periodic table | Mendeleev |
| arrangement of elements on current periodic table | increasing atomic number |
| arrangement of elements on first periodic table | increasing atomic mass |
| metals in the d block | transition |
| metals in the f block | inner transition |
| name of group 1 elements | alkali metals |
| name of group 18 elements | noble gases |
| name of group 17 | Halogens |
| has properties of metals and nonmetals | metalloids |
| can be formed into wires | ductile |
| can be hammered without breaking | malleable |
| shatters when hammered | brittle |
| another name for poor conductor of heat and electricity | insulator |