1. Nitrogen dioxide is a gas that can be generated by emissions from vehicles and
Factories. It can also be generated by natural
sources, such as forest fires, lightning, and
microbial activity in soil. The equation for
producing nitrogen dioxide is shown below.
The total number of
atoms remains
unchanged.
+
2NO
Colorless
gas
Colorless
gas
+ 2NO,
Brown
gas
The state of matter
remains the same.
E
Which of these provides evidence that a
chemical reaction occurs?
A gas is present.
CLEAR ALL

Vi limitens. vastery test select the correct answer. which statement explains why large atoms are more reactive than small atoms? a. large atoms have valence electrons farther from the nucleus and lose them more readily. b. large atoms have greater ionization energy, which they can utilize during a reaction. c. large atoms have a greater number of electrons that they can lose during a reaction. d. large atoms have more energy levels, so they have more energy to pass on in a reaction. reset next