Use the drop-down menus to answer the questions.

Which subatomic particles are indicated by the orange circles in the diagram?

Which subatomic particles are indicated by the green circles in the diagram?

What element is represented by the atom shown in this diagram?

Protons , Neutrons , and Helium

Explanation:

The number of protons is the atomic number, and the number of protons plus neutrons is the atomic mass. For hydrogen, the atomic mass is 1 because there is one proton and no neutrons. For helium, it is 4: two protons and two neutrons.

consider the reaction below.

 no rx

at 500 k, the reaction is at equilibrium with the following concentrations.

[pci5]= 0.0095 m

[pci3] = 0.020

[ci2] = 0.020 m

what is the equilibrium constant for the given reaction?

0.042

0.42

2.4

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