The gas carbon dioxide is a pure substance. Which of the following is true about carbon dioxide? (5 points) Oa
Carbon and oxygen are chemically bonded in it.
Oь
Carbon and oxygen retain their original identity in it.
It can be separated into carbon and oxygen using physical methods.
Od
The proportion of carbon and oxygen is different in different samples of the gas.

The p sub shell can hold up to 8 electrons in an atom. true or false?

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

What human activity increases beach erosion?