3. B
4. A
5.A
6. A (i think)
Hope this helps
Answer:
This list of electron configurations of elements contains all the elements in increasing order of atomic number.
To save room, the configurations are in noble gas shorthand. This means part of the electron configuration has been replaced with the element symbol of the noble gas symbol. Look up the electronic configuration of that noble gas and include that value before the rest of the configuration.
Explanation:
hope this help
I hope this would be able to help u
dont forget the symbol its +2
Answer : The time passed in years is 
Explanation :
Half-life of carbon-14 = 5730 years
First we have to calculate the rate constant, we use the formula :



Now we have to calculate the time passed.
Expression for rate law for first order kinetics is given by:

where,
k = rate constant = 
t = time passed by the sample = ?
a = initial amount of the reactant disintegrate = 15.3
a - x = amount left after decay process = 14.8
Now put all the given values in above equation, we get


Therefore, the time passed in years is 
Water is made up of atoms bonded to form molecules, the chemical formula for water is H20, and 1 side has a positive charge, while the other has a negative one.
<h3>What is water?</h3>
Water is a fundamental molecule for life on the Earth due to its physico-chemical properties.
The water formula is H2O, which means that this molecule is composed of two atoms of Hydrogen and one atom of Oxygen.
In conclusion, Water is made up of atoms bonded to form molecules, the chemical formula for water is H20, and 1 side has a positive charge, while the other has a negative one.
Learn more on water properties here:
brainly.com/question/18681949
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