3 years ago

F

Chemistry

1 answer:

kobusy [5.1K]3 years ago

8 0

Answer:

From the periodic table, Atomic number of fluorine is 7 and atomic mass is 19

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How is the modern periodic table arranged?

oksano4ka [1.4K]

By increasing atomic number

5 0

3 years ago

If you purchased 0.610 μCi of sulfur-35, how many disintegrations per second does the sample undergo when it is brand new?Expres

ASHA 777 [7]

Answer:

the sample undergo $1.67 \times 10^5$ disintegrations per second.

Explanation:

Given:

The amount of sulphur purchased is 0.671 μCi

To find:

disintegrations per second = ?

Solution:

Some of the conversions are

$1 Ci = 3.8 \times 10^{10} Bq$

1 rad = 0.01 Gy

1Gy = 1 j/kg tissue

1 rem = 0.01 Sv

1Sv = 1 j/Kg

Using these conversions,

The decay rate of this sample is calculated as

$0.671 \mu C i \times \frac{1 \mu C i}{10^{6}} \mu C i \times \frac{0.671 \times 10^{10}}{1 \mu C i}$

= $1.67 \times 10^5$ disintegrations per second

7 0

4 years ago

I need help with this question, thanks.

kotykmax [81]

Answer:

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3 years ago

Pitch is produced by what??

madam [21]

Answer:

Pitch, in the chemical-process industries, the black or dark brown residue obtained by distilling coal tar, wood tar, fats, fatty acids, or fatty oils.

Explanation:

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3 years ago

If a neutral atom of beryllium has 4 protons and 5 neutrons, what is the mass number of the atom?

kolezko [41]

9 is the mass of the atom

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4 years ago