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3 years ago

When traveling from oxygen to sulfur to selenium, through this group in the periodic table, what is changing?

2 answers:

5 0

Horizontal rows are called periods. As you travel downwards, the period is changing. (Oxygen in period 2, sulfur in period 3, and selenium in period 4)

mel-nik [20]3 years ago

4 0

Answer: The size of the element is changing.

Explanation:

Oxygen, sulfur and selenium are the elements which belong to Group 16 and periods 2, 3 and 4 respectively.

Atomic size of an element is defined as the distance between the nucleus and the outermost shell.

In a periodic table, the size of an element decreases as we move across a period and increases as we move down the group.

Down the group, new shell is getting added around the nucleus and electron is getting added in the new shell. Hence, the distance of the outermost shell from nucleus increases.

Therefore, the size of the element is changing.

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Which element would have properties most similar to those of

zysi [14]

Answer:

Explanation:

This is because they are in the same group which means they share similar properties.

7 0

3 years ago

Which description identifies the correct charge of each atomic particle? A. electron = positive; proton = negative; neutron = no

stiv31 [10]

B. electron = negative; proton = positive; neutron = no charge

3 0

3 years ago

An atom has 10 protons and 10 electrons. What happens to the charge if you add 1 more electron

Fed [463]

Answer:

it becomes a negstive charge

8 0

3 years ago

Where is a product found at the beginning or end of a chemical reaction?

olya-2409 [2.1K]

A reaction is when two or more pure substances combine with each other to form another identity of pure substances. In general from, it is written as:

A + B → C + D

The substances A and B are the reactants, while the substances C and D are the products. Therefore, in a reaction, the products are found at the end or right side of the reaction.

3 0

3 years ago

g A piece of solid Zn metal is put into an aqueous solution of Cu(NO3)2. Write the net ionic equation for any single-replacement

Nimfa-mama [501]

Answer:

Zn(s) + Cu²⁺(aq) ⇒ Zn²⁺(aq) + Cu(s)

Explanation:

Let's consider the molecular single displacement equation between Zn and Cu(NO₃)₂

Zn(s) + Cu(NO₃)₂(aq) ⇒ Zn(NO₃)₂(aq) + Cu(s)

The complete ionic equation includes all the ions and insoluble species.

Zn(s) + Cu²⁺(aq) + 2 NO₃⁻(aq) ⇒ Zn²⁺(aq) + 2 NO₃⁻(aq) + Cu(s)

The net ionic equation includes only the ions that participate in the reaction and insoluble species.

Zn(s) + Cu²⁺(aq) ⇒ Zn²⁺(aq) + Cu(s)

4 0

3 years ago