Atomic Strucutre and Math review

padilla ehs

charge of proton

+

charge of electron

-

charge of neutron

neutral

which subatomic particles are located in the nucleus?

protons and neutrons

which subatomic particle identifies an element?

protons

the atomic number of an element indicates the number of?

protons and electrons

in a neutral atom, the number of ——— is equal to the number of ———. 

proton = electrons

formula for finding mass number of mass#

protons+neutrons

What is an isotope?

diff. versions of the same element

isotopes are atoms of the same element that have diff. numbers of neutrons ———-.

neutrons

if the number of neutrons changes, what else will change for an element?

mass#

units used to measure atomic mass?

Atomic mass units (amu)

Metal

Calcium, Lithium, Arsenic, Copper

Shining, Reactive, sometimes magnetic, high melting point, malleable

Non-Metal

hydrogen, nitrogen, argon, bromine

poor conducting of heat/electricity, Brittle in solid form, Luster, no magnetic, no-reactive with acid or no malleable

Metalloid

Silicon

Shiny, Brittle, Solid at Room Temp, Thermal Conductivty, Luster, Non-reative with Acid