How many protons are in an element with an atomic number of 8 and a mass number of 16? its a written question not choices

Based on the results of this lab, write a short paragraph that summarizes how to distinguish physical changes from chemical changes.

The electron configuration of an element is shown below. 1s22s22p63s23p6 Name the group this element belongs to in the periodic table and explain your answer. Based on the electron configuration, write one chemical property of this element.

Changes in the price level affect which components of aggregate demand? a. only consumption and investment b. only consumption and net exports c. only investment d. consumption, investment, and net exports

What are the three physical properties of gases

A 2.241-g sample of nickel reacts with oxygen to form 2.852 g of the metal oxide. Calculate the empirical formula of the oxide?

At 25°C 12 M H202 is decomposed after 30 minutes the concentration of the H2O2 is found to be 9.5 M what is the average reaction rate for this decomposition reaction.

Give an example of a solution that can be seperated by simple distilation.

What is the h + concentration for an aqueous solution with poh = 3.35 at 25 ∘c? express your answer to two significant figures and include the appropriate units?

What information does a phase diagram give

Which cell structures function like power plants for plant or animal cells? A. nuclei B. vacuoles C. ribosomes D. mitochondria