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Physical 1.3
Unit 1 Chap 3 Atomic Structure
Question | Answer |
---|---|
The number of protons in one atom of an element | atomic number |
The weighted average mass of the isotope of an element | atomic weight |
A negatively charged subatomic particle outside the nucleus of an atom | electron |
An atom of an element that has the same atomic number but a different number of neutrons and a different mass number | isotope |
The sum of the number of protons and neutrons in an atom's nucleus | mass number |
A subatomic particle that has no charge in the nucleus of an atom | neutron |
The center of an atom that contains protons and neutrons and is surrounded by an electron cloud | nucleus |
A positively charged subatomic particle in the nucleus of every atom | proton |
A vertical column of elements in the periodic table | group |
An element that is usually hard, shiny, malleable, ductile, and a good conductor of heat and electricity | metal |
An element that is usually soft, not malleable or ductile, and a poor conductor of heat and electricity | nonmetal |
A horizontal row of elements in the periodic table | period |
An organized arrangement of elements in order of increasing atomic number with repeating physical and chemical property patterns | periodic table |