True or false the first species to colonize newly exposed land are called primary species?

Select the name of the period 4 transition element that forms a 3 + diamagnetic ion.

Chemical substances that are absorbed by the body through the process of digestion are called: fats proteins carbohydrates nutrients

1. If the atomic number of an element is 6 and its mass number is 14, how many neutrons are contained in the nucleus?

A 44.0 ml volume of 0.25 m hbr is titrated with 0.50 m koh. calculate the ph after addition of 22.0 ml of koh at 25 ∘c.

If you knew the valence electrons in a nonmetal atom, how who you determine the valence of the element?

The factor that affects how easily an electron can be removed from an atom is the A. surrounding atoms. B. temperature of the environment. C. size of the atom. D. structure of the atom.

NaCl in roman numerals

A compound has an empirical formula of C2H6. What additional piece of evidence is needed to determine the molecular formula? a. percent composition of carbon b. mass of the sample c. relative numbers of atoms of each element d.

Educated guess about the meaning of the word atom

Which of the following symbols could represent an atom of an element