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3 years ago

Elements within a period have the same number of what?

2 answers:

7 0

They have the same number of electrons in their orbital. Meaning that they all share the same properties.

Final answer: Electrons Shells

Levart [38]3 years ago

6 0

They have the same number of electron shells.
PERIOD 1: K shell
PERIOD 2: K, L shell
PERIOD 3: K, L, M shell
etc.

You might be interested in

A one or two letter abbreviation for a chemical element. True or false

Feliz [49]

Answer:

True

Explanation:

All the chemical elements have their abbreviations as one or two letters

The first letter in the abbreviation is a capital letter and the second letter is always a small letter

Majority of abbreviations are based on their english names

3 0

3 years ago

Hello people ~

vodomira [7]

Answer:

Cutting the supply of oxygen

Explanation:

We know that a thing need three things to burn

Oxygen
Heat
flammable object .

Co_2 stops oxygen supply so fire gets extinguished

5 0

3 years ago

I am a subatomic particle that is positively charged what am I?

lions [1.4K]

The right answer is Proton.

Additional Information:

There are three types of subatomic particles. They are:

Proton
Electron
Neutron

Proton is a positively charged particle,Electron is negatively charged particle and Neutron is charge less.

Hope it will be helpful to you...

6 0

3 years ago

The atomic weight of boron is reported as 10.81, yet no atom of boron has the mass of 10.81 amu. explain

aivan3 [116]

Boron has a lot of different isotopes, most of which having a very short half life (ranging from 770 milliseconds for Boron-8 down to 150 yoctoseconds for boron-7). But the two isotopes Boron-10 and Boron-11 are stable with about 80.1% of the naturally occurring boron being boron-11 and the remaining 19.9% being boron-10. The weighted average weight of those 2 isotopes has the value of 10.81. The reason they use the average mass of an element for it's atomic weight is because elements in nature are rarely single isotopes. The weighted average allows us to easily compare relative number of atoms of one element against relative numbers of atoms of another element assuming that the experimenters are getting isotope ratios close to their natural ratios.

7 0

3 years ago

What is the percentage by mass of copper in copper oxide (CuO)?

Viefleur [7K]

Answer:

79.89%

Explanation:

Copper has a molar mass of 63.55

Oxygen has a molar mass of 16.00

If you add these you get 79.55

To get the mass percent of copper divide copper by the whole. 63.55/79.55*100= 79.89%

7 0

3 years ago