Which quantity identifies an element?

1. Atomic number

2. Mass Number

3. total number of neutrons in an atom of the element

4. total number of valence electrons in an atom of the element

Which of the following is a physical property of matter? reactivity combustibility flammability solubility

Write the four quantum numbers for all electrons in the l and m shells. indicate which belong to the s, p and d shells. relative to electrons and states what does each of the four quantum numbers signify

Carbon and silicon are tetravalent but ge sn pb show di valency. Why

Ultimately the carbon molecules in pyruvate end up as what molecules

The weak type of bonding which attracts molecules to molecules is: ionic hydrogen covalent nuclear

The most common element in the atmosphere are

What Is the name of the force that holds together the sub Tomic particles of the nuclear?

Henry Moseley used X-ray experiments to determine the atomic number of elements. How did his discovery contribute to the development of the periodic table? A. It confirmed that elements should be arranged in strict order of increasing atomic mass. B.

Does pollution stay in the city where it originates

Cao (s) + h2o (l) = ca (oh) 2 (s) what mass of slaked lime can be produced from a mixture of 28.4 g of cao and 13.3g of h20