True or false: physical changes occur when enough energy is released or absorbed from a substance

Un compus al unui metal M care contine 20 protoni in nucleu, contine alaturi de acesta oxigen si un alt nemetal Y ce are configuratia electronica K=2e, L=8e, M=6e.

Which of the following is true for a cell that has a nucleus? A. It will not have nuclear membrane. B. It will not have a nucleolus. C. It will not have ribosomes. D. It will not have a nucleoid.

An alpha particle is closest in atomic mass to which element? a. H b. He c. Ne d. Xe

The diagram shows the scales used for recording temperatures. The labels for the scales are missing. 3 thermometers are oriented vertically labeled W, X, Y from left to right.

1. What is the speed of a plane if it travels 5000 meters in 60 seconds?

Select the correct answer. Which of these elements is rarely found in organic molecules? A. hydrogen B. oxygen C. barium D. carbon

Can a solution with undissolved solute be supersaturated

What family is the mineral lead in?

What is a greenhouse gas?

What symbol of xenon would be a part of the noble gas notation for the element?