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3 years ago

What happens to the electronegatity when you go from top to bottom on the periodic table?

Chemistry

1 answer:

barxatty [35]3 years ago

4 0

Answer:

It decreases

Explanation:

As you go down a group from top to bottom, the electronegativity decreases. Across a period, electronegativity increases from left to right.

Electronegativity is the tendency with which the atoms of the element attracts valence electrons in a chemical bond.
The more electronegative an element is, the stronger its affinity for electrons.
Electronegativity values less than 2 shows an element is a metal.
Metals are generally electropositive.

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Using the fact that at 0.10 M, the absorbance was 0.357; and at 0.20 M, the absorbance was 0.714, the absorptivity (slope) is

olga_2 [115]

Answer:

The answer is "3.57 and 0.07".

Explanation:

Using the slop formula:

$=\frac{n_2-n_1}{n_2-n_1}\\\\ =\frac{0.714-0.357}{0.20-0.10} \\\\ = ABSORPTIVITY, \ \ a=3.57 \\\\A= a\times b \times c$

Given:

$A=0.250$

length path $b=1$

from calibration it is found that

$a=3.57\\\\consentation \ c=\frac{A}{a\times b} \\\\C=\frac{0.250}{3.57\times 1}$

$=0.07 \ M$

3 0

3 years ago

Which of the following elements would most likely have the physical property of malleability?

Taya2010 [7]

A. N would probably be the one

5 0

4 years ago

Read 2 more answers

Using the periodic table, complete the table to describe each atom. Type in your answers. A [ ] B [ ] C [ ] D [ ] E [ ]

koban [17]

A 4 B 6 C Boron
D 10 E 22 F Neon

3 0

3 years ago

Atomic absorption spectroscopy was used to determine the amount of aluminum in a sample of sunscreen. A blank solution was measu

Pepsi [2]

Answer:

LOD = 0,0177

LOQ = 0,0345

Explanation:

Detection limit (LOD) is defined as the lowest signal which, with a stated probability, can be distinguished from a suitable blank signal. In the same way, quantification limit (LOQ) is defined as the lowest analyte concentration that can be quantitatively detected with a stated accuracy and precision.

There are many formulas but the most used are:

LOD = X + 3σ

LOQ = X + 10σ

Where X is average and σ is standard desvation

For the blanks readings the average X is 0,0105 and σ is 0,0024

Thus:

I hope it helps!

3 0

4 years ago

a cup of hot water cannot melt a large block of ice. However the same block melts when dropped into a lake. This is because?

alukav5142 [94]

This is because the salt in the lake lowers the freezing point. Salt makes a great ice melter, but salt cannot melt ice with just itself.

5 0

3 years ago