All categories

3 years ago

What is the total number of protons, neutrons, and electrons in a thallium, TI, atom that has a mass number of 204

Chemistry

1 answer:

a_sh-v [17]3 years ago

6 0

Answer:

Name, Thallium. Symbol, Tl. Atomic Number, 81. Atomic Mass, 204.3833 atomic mass units. Number of Protons, 81. Number of Neutrons, 123. Number of Electrons, 81 ... It has a metallic luster when it is first exposed to air but it tarnish quickly

Explanation:

Hope this helped :)

You might be interested in

PLEASE HELP WILL RATE THE BRAINLIEST

erastovalidia [21]

The Plum Pudding model of the atom was like a modernchocolate chip cookie it had subatomic particles embedded inside it in no particular arrangement

the gold foil experiment proved that there was a lot of empty space in an atom Because of the launched Particles.mostly deflected but some went through the foil

4 0

4 years ago

What is the number of electrons and protons can be seen in this atom?

pochemuha

Explanation:

the number of electrons = 8

and protons = 8 can be seen in this atom

8 0

4 years ago

What is bias?

Maru [420]

Answer:

Explanation:

bias is when you want something to be true so you might ignore evidence to make your conclusion what you want it to be.

4 0

3 years ago

Which apparent motion can be explained by a geocentric model ?

baherus [9]

Answer:

The sun's path through the sky ( i hope this helps)

7 0

3 years ago

What is the pH of a mixture of 0.042 M NaH2PO4 and 0.058 M Na2HPO4? Hint: The pKa of phosphate is 6.86.

AlekseyPX

Answer:

The pH value of the mixture will be 7.00

Explanation:

Mono and disodium hydrogen phosphate mixture act as a buffer to maintain pH value around 7. Henderson–Hasselbalch equation is used to determine the pH value of a buffer mixture, which is mathematically expressed as,

$pH=pK_{a} + log(\frac{[Base]}{[Acid]})$

According to the given conditions, the equation will become as follow

$pH=pK_{a} + log(\frac{[Na_{2}HPO_{4} ]}{[NaH_{2}PO_{4}]})$

The base and acid are assigned by observing the pKa values of both the compounds; smaller value means more acidic. NaH₂PO₄ has a pKa value of 6.86, while Na₂HPO₄ has a pKa value of 12.32 (not given, but it's a constant). Another more easy way is to the count the acidic hydrogen in the molecular formula; the compound with more acidic hydrogens will be assigned acidic and vice versa.

Placing all the given data we obtain,

$pH=6.86 + log(\frac{0.058}{0.042})$

$pH=7.00$

5 0

3 years ago