Consider four elements from Group 7A: fluorine in the second period, chlorine in the third period, bromine in the fourth period, and iodine in the fifth period. Which element has the largest first ionization energy?

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Answer 1
Answer: Out of the possible answers for this question, fluorine in the second period is correct. Of the four elements fluorine, chlorine, bromine and iodine, fluorine has the largest first ionization energy, with a Enthalpy number of 1681.0. Of all the elements, helium has the highest first ionization energy figure.

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What is a spelling bee​

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Answer: a contest in which you are eliminated if you fail to spell a word correctly.

a contest where you attempt to spell a series of words that you are given by the judges

All of the following can be used to define a base except__. A. a hydronium ion donor in a reaction B. a substance that increases the concentration of hydroxide ions C. an electron pair donor in a reaction D. a substance that is a hydrogen ion acceptor in a reaction

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All of the following can be used to define a base except__.

Answer: Out of all the options presented above the one that cannot be used to define a base is answer choice A) a hydronium ion donor in a reaction. As we already know a base is a compound that is a proton (H¹⁺) acceptor.

I hope it helps, Regards.

How many significant figures does 546.000 have

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This has only only three sig figs because it is 546.000 the zeros are just place holders so thus meaning they are not significant. It is just another way to write 546 because in that number there is also 3 sig figs. They are just trying to throw you off. Just watch out because if the example is 540 then it is just two significant digits, and it were to be 540. then it be three cause that "." makes the zero significant.  

Answer:

Its 7

Explanation:

I took the test...

What point were the authors of the Declaration trying to make in the Preamble?

HELP.

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Answer:

To explain why they are revolting against the king

Explanation:

The volume of a pond being studied for the effects of acid rain is 35 kiloliters (kL). There are 1,000 liters (L) in 1 kL and 1 mc032-1.jpg 106 microliters (mL) in 1 L. What is the volume of this pond in microliters?

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The volume of a pond being studied for the effects of acid rain is 35 kiloliters (kL). There are 1,000 liters (L) in 1 kL and 1 x 10^6 microliters (mL) in 1 L. Multply 35 by 1000/1x10^6

35 kL (1000 liters/ 1 kL) (1 x 10^6 mL/ 1 L) = 3.5 x 10^9 microliters

mixture or pure substance: 1.blood 2.dyes 3.self-raising flour 4.muesli 5.copper wire 6.distilled water 7.table salt 8.milk 9.bronze 10.tea 11.oxygen 12.air

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Answer: Mixture: Blood , Self raising flour,muesli ,dyes, milk, tea, air, bronze

Pure substance: Copper wire, distilled water, table salt, oxygen.

Explanation:

Mixture is a substance which is made up two or more number of compounds which chemically inactive and retain their distinct chemical properties.

Blood , Self raising flour,muesli ,dyes, milk, tea, air, bronze

Pure substance is defined as anything with uniform and unchanging composition is known s pure substance.

Copper wire, distilled water, table salt, oxygen.