What is produced when calcium reacts with fluorine in a synthesis reaction

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Answer 1
Answer: Calcium fluoride is produced. It is one Calcium atom bonded to two fluoride atoms. The Calcium atom receives one electron from one fluoride and a second electron from the second fluoride atom. As a result of receiving the two electrons, Calcium will have a negative charge. The two fluorides become positive from losing an electron. The positive and negative charge attraction keeps the atoms close together to form an ionic bond.

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If the mass of a sliding block is tripled while a constant net force is applied, by how much does the acceleration decrease?

Answers

As we know that if a rock is sliding under the influence of some external force then By Newton's II law we have

F = ma

now we will have

a = (F)/(m)

now we know that if force remains constant while we tripled the mass of the block then

new acceleration of the block will be given as

a' = (F)/(3m)

so here the acceleration of the block will be decreased by 3 times

How does a stars life begin?

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A stars life begins as a nebula (which would mostly be hydrogen) and starts to concentrate and compact with dust which then by gravity turns into a star. 

Which nucleus would be least likely to undergo radioactive decay?

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A large nucleus. This is because the nuclear forces are not as strong as the repulsive electrical forces between nucleons. The said nuclear force is more or less the surface tension force. In a large nucleus, it is not as strong as the repulsing forces in a smaller nucleus.

Answer:

Stable nuclei will not undergo in nuclear decay reactions. Stability of nucleus depends upon the force between nucleons.

If there is strong attraction force between the nucleons then the repulsion force between the protons will be neglected over this strong force and the nuclei is stable.

Also we can check the stability of nucleus by the ratio of neutrons and protons in the nucleus.

here the stability of nucleus is more it the ratio lie between 1 and 1.2 i.e.

1 < (N)/(P) <1.2

so the neutron to proton ratio will decide the stability of nucleus.

So it the ratio lie for above range of neutrons and protons then it is least likely to go radioactive decay.

A codec ________. a. converts binary voice signals into digital signals for transmission
b. encrypts the signal
c. encodes voice sounds into analog signals for transmission
d. encodes voice sounds into digital signals for transmission

Answers

Answer:

C

Explanation:

A codec is used for encoding

Which statement is true about a polarized object? A) It gains electrons and becomes negatively charged.
B) It gains protons and becomes positively charged.
C) The number of positive and negative charges can be the same.
D) It has to be a metal.
E) There is no change in the distribution of the charge in the object.

Answers

Answer: Option C: The number of positive and negative charges can be same.

A substance is said to be polarized when there is non-uniform distribution of electric charge. When there gain or loss of electrons, ions are formed. It is not necessary that polarized object is metal. For example, Water is polarized. The oxygen atoms have partial negative charge and hydrogen atoms have partial positive charge.

Answer:

c

Explanation:

100%

The process of a liquid becoming a gas is call what

Answers

Vaporization of a sample of liquid is a phase transition from the liquid phase to the gas phase.