Question

practice 2
select whether each statement reflects an increase, decrease or stays the same.
view the periodic table for reference \t\t\tincrease\tstays the same\tdecrease
atomic number from left to right within the same period \t\t○\t○\t○
number of energy levels from top to bottom within the same column \t\t○\t○\t○
atomic number from top to bottom within the same column \t\t○\t○\t○
number of energy levels from left to right within the same period \t\t○\t○\t○

Explanation:

To solve this, we analyze each statement using periodic table trends:

1. Atomic number (left→right, same period)

• Explanation: In a period, each element has one more proton (atomic number) than the previous.
• Answer: Increase

2. Energy levels (top→bottom, same column)

• Explanation: A column (group) has elements with one more energy level (shell) as we move down.
• Answer: Increase

3. Atomic number (top→bottom, same column)

• Explanation: Moving down a group, each element has more protons (atomic number) than the one above.
• Answer: Increase

4. Energy levels (left→right, same period)

• Explanation: In a period, all elements have the same number of energy levels (shells).
• Answer: Stays the same

Final Answers (matching each statement):

1. Atomic number (left→right, same period): Increase
2. Energy levels (top→bottom, same column): Increase
3. Atomic number (top→bottom, same column): Increase
4. Energy levels (left→right, same period): Stays the same

Answer:

To solve this, we analyze each statement using periodic table trends:

1. Atomic number (left→right, same period)

• Explanation: In a period, each element has one more proton (atomic number) than the previous.
• Answer: Increase

2. Energy levels (top→bottom, same column)

• Explanation: A column (group) has elements with one more energy level (shell) as we move down.
• Answer: Increase

3. Atomic number (top→bottom, same column)

• Explanation: Moving down a group, each element has more protons (atomic number) than the one above.
• Answer: Increase

4. Energy levels (left→right, same period)

• Explanation: In a period, all elements have the same number of energy levels (shells).
• Answer: Stays the same

Final Answers (matching each statement):

1. Atomic number (left→right, same period): Increase
2. Energy levels (top→bottom, same column): Increase
3. Atomic number (top→bottom, same column): Increase
4. Energy levels (left→right, same period): Stays the same