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Tomtit [17]
3 years ago
12

Which of the following best explains the trend in ionization energy across a period?

Chemistry
2 answers:
Alina [70]3 years ago
4 0

A) It decreases because the distance between the nucleus and outermost shell increases

Alenkinab [10]3 years ago
4 0

Answer: It increases because the outermost electrons are attracted more strongly by protons.

Explanation:

Ionization energy is the energy required to remove the most loosely bound electron from a gaseous atom. Metals have low ionization energy as they tend to attain stable configuration by losing the valence electrons.

The size of an atom decreases as we move across the period because the electrons get added to the same shell and the nuclear charge keeps on increasing. Thus the electrons get more tightly held by the nucleus.

As, the size of an element decreases, the valence electrons come near to the nucleus. So, the attraction between the nucleus and the shared pair of electrons increases and thus ionization energy increases.

Hence, the correct statement is It increases because the outermost electrons are attracted more strongly by protons.

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Which tool was most likely used in a procedure if the lab report shows that approximately 300 mL of water was used?
BARSIC [14]

Answer:

A beaker

Explanation:

8 0
3 years ago
What is the most likely reason that nonmetals are electrical insulators?
Ray Of Light [21]

Answer:

Since valence shells are mostly empty in nonmetal atoms, the atoms attract and hold any electrons they can in order to fill their valence shells.

6 0
3 years ago
Complete these metric conversions: 53 m - mm*
EleoNora [17]

Answer:

53 meters = 53000 millimeters

Explanation:

In this question we have to convert meters into millimeters .

By metric conversion,

Since, 1 meter = 1000 mm

Therefore, 53 meters = 53 × 1000

                                  = 53000 millimeters

53 meters = 53000 millimeters is the answer.

3 0
3 years ago
The temperature of a 95.4 g piece of Cu increases from 25.0 °C to 48.0 °C when the Cu absorbs 849 J of heat. What is the specifc
melisa1 [442]
<h3>Answer:</h3>

0.387 J/g°C

<h3>Explanation:</h3>
  • To calculate the amount of heat absorbed or released by a substance we need to know its mass, change in temperature and its specific heat capacity.
  • Then to get quantity of heat absorbed or lost we multiply mass by specific heat capacity and change in temperature.
  • That is, Q = mcΔT

in our question we are given;

Mass of copper, m as 95.4 g

Initial temperature = 25 °C

Final temperature = 48 °C

Thus, change in temperature, ΔT = 23°C

Quantity of heat absorbed, Q as 849 J

We are required to calculate the specific heat capacity of copper

Rearranging the formula we get

c = Q ÷ mΔT

Therefore,

Specific heat capacity, c = 849 J ÷ (95.4 g × 23°C)

                                        = 0.3869 J/g°C

                                        = 0.387 J/g°C

Therefore, the specific heat capacity of copper is 0.387 J/g°C

3 0
2 years ago
Why doesn't all soil look and feel the same? List 3 reasons
Katen [24]

Answer:

all soil are also different due to how they were form

3 0
2 years ago
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