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vova2212 [387]
3 years ago
10

Which of the following elements is the most reactive metal?

Chemistry
2 answers:
aivan3 [116]3 years ago
7 0
D) Lithium
lithium is an alkali metal. alkali metals are very very reactive
Gennadij [26K]3 years ago
3 0

Answer:

D

Explanation:

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What do we call the experimental apparatus that William crooks used in his experiments and what did he discover
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Answer: It is called a Crookes Tube, and he used it to discover cathode rays, which were later determined to be electrons.

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3 years ago
Pleaseee helpppppppp​
ahrayia [7]

Answer:

Potassium

1s2 2s2 2p6 3s2 3p6 4s1

Explanation:

The atom having only one electron its outermost shell must belong to an element in group one of the periodic table.

Having noted that, we proceed to find out what element in group one that has the atom just described in the question.

That atom must belong to an element in the fourth period. The only group 1 element in the fourth period is potassium.

The electron configuration of potassium is;

1s2 2s2 2p6 3s2 3p6 4s1

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What is true about all chemical equations?<br> Links are reported
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3 0
2 years ago
Which pair of atoms has the highest electronegativity difference?
zavuch27 [327]
The best way to accurately determine the pair with the highest electronegativity difference is by using their corresponding electronegativity values. For the each of the choices, the difference is:

A. H-S = 2.5 - 2.1 = 0.4
B. H-Cl = 3 - 2.1 = 0.9
C. N-H = 3 - 2.1 = 0.9
D. O-H = 3.5 - 2.1 = 1.4
E. C-H = 2.5 - 2.1 = 0.4

As show, D. has the highest difference. Without looking at their values, you can also determine the pair with the highest difference by taking note of the trend of electronegativity on the periodic table. Electronegativity increases as you go right a group and up a period. This makes oxygen the most electronegative element among the other elements paired with hydrogen.
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3 years ago
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