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science - chemistry

6th grade

QuestionAnswer
The smallest unit of an element that maintains the properties of that element. Atom
a substance that cannot be seperated or broken down into simpler substances by chemical means Element
a subatomic particle that has a positive charge and that is found in the nucleus of an atom proton
a subatomic particle that has no charge and that is found in the nucleus of an atom neutron
a subatomic particle that has a negative charge. electron
in physical science, an atom's central region, which is made up of protons and neutrons nucleus
a charged particle that forms when an atom or a group of atoms gains or loses one or more electrons ion
How many electrons are in each atom? The atomic number tells us.
How do we find the number of neutrons? Round the atomic mass to the nearest whole number, then subtract the atomic numbers.
First enery level of an atom can have _______ electrons? two
The second energy level of an atom can have ________ electrons eight
The outermost energy level of an atom can have _______ electrons. eight
How many protons are in an atom? The atomic number tells us.
Created by: jjscaputo