If an atom has 5 electrons in the 3rd orbital what “time” on a clock would the 5th orbital be at?

Which of the following units is not an official si unit

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided

When did stem cell research become known ? who discovered stem cell? what experiments or studies have been conducted so far?