its A. Genes make up chromosomes. it did it on study island..... i did the other answer the other person got and i got it wrong....and then it told me it was A. Genes make up chromosomes.
HOPE I COULD HELP
Answer:
(a) (i) All the elements of a group have similar chemical properties because they have same no. of valence electrons in their outermost shell. (ii) All the elements of a period have different chemical properties because they have different no. of valence electrons in their atoms.
33.6 moles are needed to completely react with 84.0 moles of O2
jupiter has a large number of suprisinfly 30 moons! (thirty) I hope that this helps you! ☺ ☻ §
