Answer:
please mark me brainliesf if it is right
40 N.
ANSWER
1)4d^10 should be 3d^10
2) 3s^2 is impossible and 3d^5 it should be p not d
3) Ra is not a noble gas
4)Valid
5)Element can’t be its own electron configuration.
To determine whether the crown was made of pure gold or not, we need to compare the density of gold (19.3 g/mL) to the density of the crown.
The formula for density is

we know the mass of the crown is 714 grams and its volume is 38.3 mL. (Because it displaces 38.3 mL of water)
Using this information, we can plug the numbers into our density formula to solve for the density of the crown.

The density of the crown is 18.6 g/mL, thus the crown was not made of pure gold, as that has a density of 19.3 g/mL. In conclusion, the goldsmith tried to screw over the king.
Answer: D may be equal to, greater than, or less than the total amount of the reactants.
Explanation:
Answer:an article or substance that is manufactured or refined for sale.
"food products"
2.
a thing or person that is the result of an action or process.
"her perpetual suntan was the product of a solarium"
Explanation: