Which of the following groups contains reactive elements that need to gain only one electron to have a full outer energy level?

alkali metals

alkaline earth metals

halogens

noble gases

All compounds experience and must overcome dispersion forces. The other forces depend on the polarity of the molecule. Is this molecule polar or nonpolar?

Chlorine and potassium atoms form ionic bonds, carbon atoms form non-polar covalent bonds with nitrogen atoms, and oxygen forms polar covalent bonds with phosphorus. Explain why these bonds are the types they are.

Has its own size and shape

A sample of helium gas is in a sealed, rigid container. What occurs as the temperature of the sample is increased?

Which of the following is a strong base? КОН b. H2 11 c. NH d. HCI a.

What do scientists do during data collection? O A. Analyze information to form a summary B. Gather information during an experiment C. Observe and ask scientific questions O D. Design an experiment to test a hypothesis

Organic molecules always: A. contain carbon. B. contain carbon, hydrogen, and oxygen respectively in a 1:2:1 ratio. C. are produced by living organisms. D. dissolve in water.

Whats the scientific notation of 0.00000923

A catalyst increases the rate of a chemical reaction by

What energy is changed to cell energy in stage 1 of photosynthesis. true or false