Beryllium, magnesium and calcium all are located in the alkaline earth group. Which of these characteristics do these elements have
in common?
They cach have similar densities,
They cach have a similar melting point
They each form similar compounds when combined with oxygen
D)
They cach have their valence otectrons in the same energy level

the child will have heterozygous dominant chromosomes as characters of his father are dominant over the characters of his mother.

the child is heterozygous

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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