Which statement is completely accurate? Atoms of the same element can have different numbers of neutrons.

Atoms of the same element can have neutrons but exist without protons.

Atoms of the same element always have different numbers of neutrons.

Atoms of the same element always have different atomic weights.

Both josef loschmidt and amedeo avogadro contributed to our understanding of basic molecular numbers, sizes, and reaction ratios. neither scientist discovered “avogadro’s number” in the form we use it today (6.02 x 10 23). still, there’s a controversy over the name. research the contributions from these two scientists and read about how avogadro’s number got its name. briefly state what you think this number should be called, providing key details of each scientist’s contributions to this concept and a solid rationale for your case in naming the number.

Acompound contains c, h, and o atoms. when 1.130 g of the compound is burned in oxygen, 1.064 g co2 and 0.3631 g h2o are produced. what is the empirical formula of this compound?

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true