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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 |