1 Name each subatomic particle, its charge, and its location in an atom.
A. proton, positive charge, nucleus; neutron, positive charge, nucleus; electron, no charge, space around nucleus
B. proton, positive charge, nucleus; neutron, no charge, nucleus; electron, negative charge, space around nucleus****
C.
proton, no charge, nucleus; neutron, positive charge, nucleus; electron, negative charge, space around nucleus
D.
proton, no charge, nucleus; neutron, negative charge, space around nucleus; electron, no charge, nucleus
2 Which of the following is true of an exergonic chemical reaction?
A. Reactants lose mass as products are formed.
B. Bonds are broken in reactants and new bonds are formed in products.
C. No activation energy is required to initiate it.****
D. The energy released is captured by a catalyst.
The following shows a graph of the energy changes taking place as a chemical reaction progresses. If an enzyme is added, which arrow’s magnitude will change? Will it increase or decrease?
__________
↑ / ⬆ \
E Reactants / \
n ____↓______/ \
e ⬆ \
r \
g \ Products
y \________↓______
______________________________________________________
Reaction Progress →
A. Arrow A will increase.
B. Arrow A will decrease.***
C. Arrow B will decrease
D. Arrow B will increase.
1. B
2.C
3. B
Great! Let's break down the answers step by step:
1. Name each subatomic particle, its charge, and its location in an atom.
The correct answer is B: proton, positive charge, nucleus; neutron, no charge, nucleus; electron, negative charge, space around nucleus.
2. Which of the following is true of an exergonic chemical reaction?
The correct answer is C: No activation energy is required to initiate it.
3. If an enzyme is added, which arrow's magnitude will change? Will it increase or decrease?
The correct answer is B: Arrow A will decrease.
So the correct answers are:
1. B
2. C
3. B
To answer question 1, you need to have a basic understanding of the structure of an atom. An atom consists of three subatomic particles: protons, neutrons, and electrons.
Protons have a positive charge (+1) and are located in the nucleus of an atom. Neutrons have no charge (0) and are also found in the nucleus. Electrons have a negative charge (-1) and are located in the space around the nucleus.
So, the correct answer for question 1 is B: proton, positive charge, nucleus; neutron, no charge, nucleus; electron, negative charge, space around nucleus.
For question 2, you need to know about exergonic chemical reactions. Exergonic reactions release energy. The choices provided are:
A. Reactants lose mass as products are formed.
B. Bonds are broken in reactants and new bonds are formed in products.
C. No activation energy is required to initiate it.
D. The energy released is captured by a catalyst.
The correct answer is C: No activation energy is required to initiate it. Exergonic reactions release energy spontaneously, so they do not require additional energy input to start.
To analyze the graph and answer the last part of question 2, you need to understand the concept of activation energy and the role of enzymes. Enzymes are catalysts that lower the activation energy required for a chemical reaction to occur.
Looking at the graph, if an enzyme is added, the magnitude of "Arrow A" will decrease. This is because the enzyme lowers the activation energy, making it easier for the reaction to proceed. So, the correct answer is B: Arrow A will decrease.