bhp

Atomic number

number of protons

Atomic mass

protons + neutrons

Protons

positive, in nucleus

Neutrons

no charge, in nucleus

Electrons

negative, orbit around nucleus

Ion

atom that gained/lost electrons (has charge)

Isotope

same element, different number of neutrons

Moving LEFT to RIGHT across a period

both atomic number AND atomic mass increase

Carbon has highest melting point among first 10 elements

false

Main sequence

fuses hydrogen → helium

Red giant

hydrogen runs out, starts fusing helium, gets bigger/brighter

Supernova

massive star explodes at end of life

White dwarf

Less than 8 Sun masses

Neutron star

8-20 Sun masses

Black hole

More than 20 Sun masses

created in supernovas

Heavy elements

Without stars

only hydrogen and helium would exist