Which element is so active chemically that it occurs naturally only in compounds?1. Potassium
2. Silver
3. Copper
4. Sulfur

Answers

Answer 1

Answer: 1) POTASSIUM is an element that is chemically active that it occurs naturally only in compounds.

Potassium is one of the alkali metals; alkali metals are the most active metals.
Potassium is so active that it never occurs free in nature. It always occurs in compounds, combined with other elements.

95% of potassium is used as fertilizers, the remaining 5% is divided into creating potassium hydroxide, potassium chloride solution, and potassium carbonate.

Potassium hydroxide is used to make soaps and detergents.
Potassium chloride is used in pharmaceuticals, medical drips, and saline injections.
Potassium carbonate is used in glass manufacturing; particularly, glass used in television sets.
Other potassium salts are used in making iodized salts, used in baking, tanning leather, and photography.

Answer 2

Answer:

Final answer:

Potassium is the element that is so active chemically that it occurs naturally only in compounds.

Explanation:

The element that is so active chemically that it occurs naturally only in compounds is potassium.

Potassium is a highly reactive alkali metal that is commonly found in nature bonded to other elements in compounds. It is not found in its pure form due to its reactivity.

An example of a compound that contains potassium is potassium chloride (KCl), which is commonly used as a salt substitute.

Learn more about Potassium here:

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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.

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Silicon-30 contains 14 protons. It also contains ?

Answers

16 neutrons
Since the atomic mass (30) is equal to the number of protons + the number of neutrons
in an equation, it would be 30=14+x
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What is the common name of a biological sedimentary rock composed of microcrystalline silica (SiO2) originally formed as shells of living diatoms and radiolarian plankton, compressed into hard, flaky rock that can be used to make tools

Answers

Answer:

Chert

Explanation:.

Chert is a sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide (SiO2). It occurs as nodules, concretionary masses, and as layered deposits.

What are the elements in the first vertical line of the periodic table?

Answers

The first vertical row of elements are all alkali metals with the exception of hydrogen which is a transition metal.The elements are:Hydrogen(H) with an atomic number of 1Lithium(Li) with an atomic number of 3Sodium(Na) with an atomic number 11Potassium(k) with an atomic number 19Rubium(Rb) with an atomic number of 37Cesium(Cs) with an atomic number of 55Fracium(Fr) with an atomic number of 87

What is the percent by mass of carbon in C10 H14 N2?

Answers

Answer: The percentage by mass of carbon in the given compound is 45.8 %

Explanation:

We are given a chemical compound having chemical formula $C_(10)H_(14)N_2$

To calculate the percentage composition of an element in a compound, we use the equation:

$\%\text{ composition}=\frac{\text{Mass of carbon element}}{\text{Mass of compound}}* 100$

In 1 mole of given compound, 10 moles of carbon atoms are there.

Mass of $C_(10)H_(14)N_2= [(10* 12)+(14 * 1)+(2* 14)]=262g/mol$

Mass of carbon element = $[10* 12]=120g/mol$

Putting values in above equation, we get:

$\%\text{ composition of carbon}=(120)/(262)* 100=45.8\%$

Hence, percentage of carbon in given compound is 45.8 %.

Multiply the number of each element by its mass on the periodic table.

Add them together.

Put the mass of carbon only over the total mass and multiply the result by 100 to get the percentage.

What ions are in water all the time?

Answers

Answer:

(Ca2 +, Mg2 +, Na+, and K+) and four major anions ( , , SO 4 2 - , and Cl-) with ionic forms of N, P, Fe, and other trace elements at lower concentrations (Livingstone 1963, Meybeck 1979) (Table 4.7).

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