A neutral atom has two electrons with n = 1, eight electrons with n = 2, eight electrons with n = 3, and one electron with n = 4. It has no other electrons. What is the atomic number of this element?

Which is not an essential component of a voltaic cell? A. Negative electrode (anode) B. Positive electrode (cathode) C. Electrolyte D. Voltmeter

Hno3 (aq) + k2so3 (aq) → express your answer as a chemical equation. identify all of the phases in your answer.

What do animals use to clone from a cell in one parent

One parent is 6 feet tall and the other parent is 6 feet 4 inches tall. What is the best prediction for the height of the offspring of the two parents? A. The offspring will be about 6 feet tall, but the exact height cannot be predicted. B.

Benzene has the empirical formula and an empirical formula weight of 13.0 amu. If the molecular weight is 78.0 amu, what is the molecular formula? (Enter the elements in the order: C, H.)

Students measuring the mass of a rock record 6.759 g, 6.786 g, 6.812 g, and 6.779 g. Which other measurement of the block's mass would be most precise? A. 6.702 g B. 6.781 g C. 6.605 g D. 6.858 g

What two elements make up dihydrogen monoxide?

What did scientists observe using the earliest microscopes

Which statement describes the redox reaction that occurs when an object is electroplated? A. It is spontaneous and requires an electric current. B. It is spontaneous and produces an electric current. C.

How are electromagnetic different than all other waves