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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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A single covalent bond is made up of

SIZIF [17.4K]

Answer:

In chemistry, a single bond is a chemical bond between two atoms involving two valence electrons. That is, the atoms share one pair of electrons where the bond forms. Therefore, a single bond is a type of covalent bond.

Explanation:

(copied from Google)

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3 years ago

the reversible reaction N2(g) 3H2(g) <--> 2NH3(g) produces ammonia, which is a fertilizer. At equilibrium, a 1L flask cont

Alik [6]

Answer:

Explanation:

the chemical equilibrium constant can be easily calculated since the concentrations at equilibrium are given.the calculation shows the value of Kc for the reversible reaction and forward reaction

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3 years ago

A gas is collected over water at a certain temperature. The total pressure is 762. mmHg. The vapor pressure of water at this tem

ehidna [41]

I Believe The Answer Is D.

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3 years ago

Read 2 more answers

________________ is 'The movement of a liquid up a narrow tube due to adhesive affects.'

jolli1 [7]

Answer: capillary action

Explanation: it occurs when the adhesion forces (attraction between two surfaces or substances) in the liquid are stronger than the cohesion forces (attraction between the same molecule)

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3 years ago

Velocity is the slope of the acceleration vs. time graph. O A. True False

Maurinko [17]

Answer:

False

Explanation:

The slope of a velocity-time graph gives acceleration. Acceleration can be defined as the change in velocity with time.

A slope denotes the gradient of line. It takes into consideration the changes on both y and x axis. The ratio of the changes gives the slope.

On a velocity-time graph, the y-axis is the velocity and the x-axis is time. The change in velocity with time gives acceleration.

The slope of an acceleration

-time graph is not velocity.

7 0

3 years ago