Calcium has an atomic number of 20. 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: 2 electrons. it has electron configuration of 2.8.8.2 hence the last 2 will be lost for it to gain stable.
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A 0.20-Molar solution of K2CO3 is a better conductor of electricity than a 0.20-Molar solution of KBr. Which of the following BEST explains this observation between the two solutions. *
Outliers existing in a data set will have the greatest impact on __________. A. the mean B. the median C. the mode D. the middle
Which of these is always equal to the molar mass of any element?its atomic number its atomic weight its atomic formula its atomic structure

Which of these statements is true of saturated hydrocarbons?a. They contain one carbon to carbon double bond.
b. They have at least one carbon to carbon double bond.
c. They have one or more carbon to carbon triple bonds.
d. They contain only single bonds.

Answers

The answer is (d.) They contain only single bonds.
The hydrocarbons which only contain single bonds between the carbon atoms are referred as saturated hydrocarbons. These hydrocarbons have carbon atoms bonded by many hydrogen atoms making it saturated. These are also the simplest class of hydrocardons.

Which of the following is a quemical property ?

Answers

One chemical property would be reactivity of a particular substance.

Which of the following particles has the greatest mass? A)An alpha particle B) A Beta Particle C) A Proton D) An Electron

Answers

The answer is c) a proton

You are given an aqueous solution of NaCl. The simplest method for the separation of NaCl from the solution is (A) evaporation of the solution to dryness
(B) centrifuging the solution
(C) osmosis of the solution
(D) electrolysis of the solution
(E) filtration of the solution

Answers

A: evaporating the solution to dryness

Physical activity and exercise typically lead to __________.a. increased stress
b. depression
c. higher energy levels
d. reduced quality of life

Answers

Physical activity and exercise typically lead to higher energy levels. As your body gets used to working hard consistently, you tend to be more prepared and in better physical condition. Your body begins to learn that you should burn up calories quickly to prepare to be active, and this results in increased energy levels even when you're not currently exercising.

Physical activity and exercise typically lead to higher energy levels and the correct option is option C.

Engaging in regular physical activity stimulates various physiological responses in the body, including increased blood flow and oxygen delivery to the muscles, improved metabolism, and release of endorphins, which are natural mood-enhancing chemicals. These effects contribute to a boost in energy levels and feelings of alertness.

Additionally, exercise can improve overall fitness and stamina, allowing individuals to perform daily activities with less fatigue. Regular physical activity is also associated with improved sleep quality, which further enhances energy levels during waking hours.

Thus, the ideal selection is option C.

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Which of the following is the best example of heat being. Transferred by conduction