CHEMISTRY HIGH SCHOOL

Which element has the smallest atomic radius? calcium potassium scandium titanium

Answers

Answer 1
Answer:

 The element  that has the smallest  atomic radius is  titanium


          explanation

  • Calcium,potassium,  scandium and titanium are in  period  4 in the periodic table.
  • Generally  the atomic   radius    decreases  across the period (from the left to the right) .  This is because  across the period  there is increase  in nuclear charge  which  make electrons been strongly attracted to the nuclear.
  • Titanium is in atomic number 22 thus it has  more nuclear  charge  that  calcium,potassium and  scandium therefore  titanium has the  smallest atomic radius.
Answer 2
Answer:

Answer:

Which element has the smallest atomic radius?

❌calcium

❌potassium

❌scandium

✔titanium

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Plz I need help is the 2nd time I post this
Atoms A and X are fictional atoms. Suppose that the standard potential for the reduction of X^2+ is +0.51 V, and the standard potential for the reduction of A^2+ is -0.33. Find the standard potential for an electrochemical cell with the cell reaction that follows.
An atom of sodium-23 (Na-23) has a net charge of +1. identify the number of protons, neutrons, and electrons in the atom. How did you determine the number of each type. Explain in completer s details.
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What happens if you overmix muffins?

Answers

Answer: When you overmix the muffin batter, it crushes the air bubbles and ruins the fluffy texture.

Explanation: → Follow this tip: To ensure a batch of light, fluffy muffins, mix the dry ingredients with the wet ingredients until just barely combined, and no more dry flour is visible.
The batter is going to be tasting bad and gross

How many molecules in a mole?​

Answers

Answer:

One mole of a substance is equal to 6.022 × 10²³ units of that substance (such as atoms, molecules, or ions). The number 6.022 × 10²³ is known as Avogadro's number or Avogadro's constant.

Explanation:

hope this helped!

If the plum pudding model was correct, what would the result of rutherfords expirement be

Answers

Most of the positively charged particles should bounce back at a range of angles as they collide with the atoms in the foil; only a few should pass straight through the foil.

The concentration of greenhouse gases in the atmosphere can and does change. Would conditions on Earth be worse if the concentration of gases increased or if it decreased? Use Figure 4-4 to explain your answer.

Answers

Answer:

The concentration of green house gases must be appropriate in order to maintain an optimum temperature on the earth.

More the concentration of gases on earth, the temperature would increase because the green house gases more heat in it.

If the overall green house gas will decrease then also the temperature on the earth will not be adequate for living as it will be too cold.

hence, the balance is maintained only when there is a proper concentration of carbon dioxide in atmosphere.
According to climate scientists the increase in greenhouse gases is negatively impacting the planet and human life by raising the temperature of the planet which is leading to other adverse climate effects. If greenhouse gases were to decrease it could potentially help the situation to elevate some of the pressures currently leading to climate change. However, if greenhouse gases are to increase it will likely have an increasingly negative impact on human life and the homeostasis of the planet. 

Radioactive cobalt-60 is used in radiation therapy treatment. Cobalt-60 undergoes beta decay. This type of nuclear reaction is called(1) natural transmutation
(2) artificial transmutation
(3) nuclear fusion
(4) nuclear fission

Answers

The answer is (1) natural transmutation. When Co-60 undergoes beta decay (be it beta positive or beta negative), the product is another element (Fe or Ni). Transmutation is when an element turns into another element via a nuclear process. Since this occurs without the aid of another agent that causes the nuclear change (e.g. a neutron source), it is natural transmutation.

If the reaction is at dynamic equilibrium at 500 K, which statement applies to the given chemical system?The forward and reverse reactions no longer occur.
The rates of the forward and reverse reactions are unequal.
The concentrations of the products and reactants do not change.
The forward reaction stops at 500 K.

Answers

The correct option is this: THE CONCENTRATION OF THE PRODUCTS AND THE REACTANTS DO NOT CHANGE.

A reversible chemical reaction is said to be in equilibrium if the rate of forward reaction is equal to the rate of backward reaction. At this stage, the concentrations of the products and the reactants remain constant, that is, there is no net change in the concentration even though the reacting species are moving between the forward and the backward reaction.

If the reaction is at dynamic equilibrium at 500 K, the statement that applies to the given chemical system is The concentrations of the products and reactants do not change.
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