4. Mendeleev created the first periodic table by arranging elements in order of A. Decreasing atomic mass.
B. Increasing atomic mass.
C. increasing atomic number.
D. Increasing melting points and densities.

pls help

c

Explanation:

C is the answer for increasing Atomic number

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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