are protons and electrons the same number? true of false?
true.
what number is the atomic mass of ²³₁₁Na?
23.
what is atomic mass?
protons + neutrons.
how do find the number of neutrons in the nucleus?
atomic mass - atomic number.
where is the atomic number?
found on the bottom of an element e.g ₁₁Na.
what is the atomic number?
the number of equal protons and electrons.
what are groups?
how many electrons in the outer shell.
what charge do you get when you lose an electron?
positive. e.g 11 protons, 10 electrons. meaning it has a charge of +1 because of the difference between electrons and protons. however if you lost 2 electrons, the charge would be +2 because of the difference. P-E
what charge do you get when you gain electrons?
negative. e.g 11 protons, 12 electrons. meaning it has a charge of -1 because of the difference between protons and electrons. however if you gained 2, the charge would be -2.(P-E)