How many valence electrons do the following elements have? Input with numerical answers. aluminum: [Al] krypton: [Kr]

When the elements calcium and sulfur combine to make an ionic compound what is its formula? Write the proper formula for the ionic compound.

When the elements magnesium and oxygen combine to make an ionic compound what is its formula? Write the proper formula for the ionic compound.

What is the isotopic symbol of an atom that has 16 protons and 19 neutrons?

Discuss 2-3 points of interest or facts from your discussion assignments from week 2-4. Focus on only 1 week from the selection below:Week 2: How Pee Brought You the Modern WorldWeek 3: Hunting the ElementsWeek 4: Household Chemical Compounds

A dose of 5.0 mg aspirin per kilogram of body weight has been prescribed to reduce the fever of an infant weighing 4.6 kilograms. How much aspirin in milligrams should be administered? Answer in whole numbers.

How many valence electrons do the following elements have? Input with numerical answers. calcium: [Ca] bormine: [Br]

In a couple of sentences summarize the contributions of Democritus and Dalton to the atomic theory; in other words what did they propose?

Write the proper formula for the ionic compound named beryllium hydroxide.

Put in your own words what is the difference between an elemental substance, a compound, a homogeneous mixture and a heterogeneous mixture. Give one example for each category.