How were atoms made in scince

Why do atomic model has changed over time

According to Le Châtelier's principle, what would happen to a system at equilibrium if more of one compound in a reaction were added?

The conjugate base of hydroquinone is used in the synthesis of PEEK. Is hydroxide a strong enough base for deprotonating hydroquinone? Phenolic protons (pKa ~ 10) are acidic than water (pKa ~ 15.

All solutions contain 2 or more compounds. True or False and explain

What did Thomas contribute to the model of the atom? 1. the electron 2. the nucleus 3. the neutron 4. the electron cloud

Which of the following correctly describes the process of inspiration (air entering the lungs). A. The lungs expand, causing their internal pressure to decrease B. The lungs expand, causing their internal pressure to increase C.

How many molecules are in 1.00 gram of water, h2o?

How many molecules of atp are produced in aerobic versus anaerobic cellular respiration

Because antigen receptor genes are randomly rearranged, some immature lymphocytes produce receptors specific for epitopes on the organism's own molecules. why doesn't the immune system attack these molecules on the body's cells and tissues?

Triacylglycerols (triglycerides) are the form of lipids that are efficient reserves for storage of energy, and are found in adipose tissues. (T/F)