## How do you find your mass number?

Together, the number of protons and the number of neutrons determine an element’s mass number: mass number = protons + neutrons. If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number.

## How many protons neutrons and electrons are in the ion 57fe3 +?

Practice Problem 1. Determine the number of protons, neutrons, and electrons in a 210Pb2+ ion. The atomic number of lead is 82, which means this ion contains 82 protons. Since it has a charge of +2 , this ion must contain 80 electrons.

30 protons

## How many electrons does Hg2+ have?

Explanation: And so for Hg we got 80 electrons to distribute according to the Aufbau scheme…. And so for Hg2+ we got 78 electrons to distribute ……..

## How many electrons are in Mercury’s outer shell?

two valence electrons

## How many valence electrons does platinum have?

3 valence electrons

## How can we find Valency of platinum?

Answer: Valency of platinum is 4 or 2. Explanation: Valency is defined as the combining power of an element when it combines with other atoms and forms chemical compounds or molecules. Platinum is the 78th element of the periodic table.

78

## Will the price of platinum go up?

“While both metals are expected to rise during the year, platinum is expected to outperform palladium,” he added. “Platinum’s price performance is expected to lag only that of silver among the exchange-traded precious metals.”

## How can you tell a platinum nugget?

The simplest tests are heating and discoloration. If the item is heated, for example, in a Bunsen flame, platinum will be more difficult or impossible to melt and the platinum will not discolour. The effect of acid is another basic test. None of the common acids will attack Pt.

## How much does a bar of platinum cost?

The per ounce cost will generally go down as the amount of ounces purchased goes up. For example, a dealer currently has a 1 ounce platinum Valcambi bar selling for \$1,533 and a 10 ounce varied brand platinum bar selling for \$15,030.

## How much is a kilo of platinum worth?

Platinum Price in US Dollars

Platinum Spot Price Platinum Price Today Change
Platinum price per ounce 1,182.00 +39.00
Platinum price per gram 38.00 +1.25
Platinum price per kilo /td>

+1,253.88
Platinum price in pennyweight 59.10 +1.95