click below
click below
Normal Size Small Size show me how
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 |