How many electrons does calcium lose when forming an ionic bond with another ion?a. 1
b. 2
c. 3
d. 4

Answers

Answer 1

Answer: The correct answer is answer choice B, 2. Calcium is in Column 2, meaning that it has 2 electrons in its outermost energy level. These two electrons must be lost for it to form an ionic bond with another element and become stable.

Questions like these can be easily answered if you have a periodic table on hand. Elements in Column 1 need to lose 1 electron to form ionic bonds, elements in Column 2 need to lose 2, and so on. Keep in mind, however, that elements in the center of the table are more likely to form metallic or covalent bonds, and elements in Columns 16 and 17 need to gain 2 and 1 electrons, respectively.

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Which of the following is true of group 6A?Includes Chlorine

Includes Sulfur

Gain 2 electrons

Tend to form +2 ions

Have 5 valence electrons

Answers

Answer:

The answer to your question is: Includes sulfur and gain two electrons

Explanation:

Includes Chlorine This option is wrong, Chlorine belongs to group VII.

Includes Sulfur This option is true, Group VI includes Oxygen, Sulfur, Selenium, Tellurium.

Gain 2 electrons. This option is true, Elements in group VI have six valence electrons so they gain to electrons to become estable.

Tend to form +2 ions This option is wrong, this elements form -2 ions

Have 5 valence electrons This option is wrong, this elements have 6 valence electrons.

The volume of a fixed amount of gas is doubled, and the absolute temperature is doubled. According to the ideal gas law, how has the pressure of the gas changed?

Answers

Answer:

It stays the same

Explanation:

Sawing a board in half is an example of a chemical change

Answers

Sawing a board in half is a physical change not a chemical change the board doesnt change wood or whatever material it is is still would still be wood
If it were burned it would be a chemical change but its properties stay the same atomically so thats why its not a chemical change.

At constant volume, if the Kelvin temperature of a gas is doubled, the pressure of the gas is halved.A. True
B. False

Answers

False
I got this question right on the test

Answer:

False

Explanation:

Because if Kelvin temperature gas is doubled, the pressure would not change

What is the symbol for Phosphorus on the periodic table of the elements?

Answers

On the periodic table, Phosphorus is P.

P is the symbol
Hope this helped :)

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

Answers

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.

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.