chemistry atomic structure please get right
11 which of the following is atoms mass number
number of protons plus number of neutrons
number of electrons only
number of protons only
number of neutrons only
12 which of the following are charged and located within the nucleus of an atom
protons
neuttrons
electrons
protons and electrons
13 an atom has a charge of +1 in its nucleus which statement must be true in order for this atom to have no net charge
the one positive proton has no influence on the overall charge of the atom
there is one neutral neutron in the nicleus as well
there is one negatively charged electronoutside the nucleus
there is one negatively charge electron in the nucleus
14 rutherfords gold foil experiements proved the exisitence of which of the following
the neutron
the electrons outside the nucleus
the protons only
the nucleus
15 which of the following is the most massive part of the atom
nucleus
orbitals
neutrons
protons
16 an atom of strontium has at least four different isotopes what is different between an isotope of 86 Sr and an isotope of 87 Sr
the number of protons in the neucleus
the size of the nucleus
the number of electrons in the atom
the number of neutons in the nucleus
17 what is the average atomic mass of a sample of indium
114.5 amu
114.818amu
113.909amu
115.00amu
18 an atom of 14 protons and 14 neutrons what is the chemical symbol for the atom consult periodic table
Cr
Si
Al
Mg
19 an atom has an average atomic mass of about 24.3 amu what is the chemical symbol for the atom
Ca
Mg
Cr
Mn
20 an atom of varnadium has 23 protons how many electrons must it have if it has a net charge of O
24
23
25
26