Which Idea was once accepted is now considered a scientifically inaccurate

A. tge nucleus is the center of the atom

b. an atom is solid material

c. electrons have a negative charge

d. electrons are arranged in layers

Which is not a compound? A. carbon dioxide gas B. oxygen gas C. water D. silicon dioxide

How many s electrons does Ca + possess?

Why can't you use the largest objective for some slides

Match each type of organic compound to its description. Match Term Definition Alcohol A) Made up of aldehydes or ketones bonded together Amine B) Organic compound with hydroxyl group (-O-H) Carbohydrate C) Contains a nitrogen bonded to carbon (s)

True statements:1) deltaH for endothermic reaction is positive3) when the energy is transferred as heat from system to surroundings, deltaH is negative. 6) A combustion reaction is exothermic.

How is the hardness range for a mineral determined?

How do I find density

Which statement describes a concept included in the wave-mechanical model of the atom? 1. Positrons are located in shells outside the nucleus. 2. Neutrons are located in shells outside the nucleus. 3.

The process by which rocks are broken down into smaller fragments by the atmosphere and other factors in the environment is called?

What happens when a given amount of gas at a constant temperature increases in a volume?