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djverab [1.8K]
3 years ago
10

In the periodic table we use today, the ordering of the elements is based on _____.

Chemistry
1 answer:
Firdavs [7]3 years ago
3 0
<span>The ordering of the elements is based on Atomic number. 
Atomic number is the number of protons inside the nucleus of an atom. 

Ordering is from left to right. Atomic number increases successively from left t</span>o right.
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What is the potential energy of your 3 kg puppy that is sitting in the grass in your backyard?
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As we know that

P.E. = mgh

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P.E. = Potential energy of the object =?

m= mass of object= 3kg

g= acceleration due to gravity = 9.8 ms^-2

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Then

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6 0
2 years ago
What is radioactive decay?
swat32

Answer:

Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive. Three of the most common types of decay are alpha decay, beta decay, and gamma decay, all of which involve emitting one or more particles or photons.

Explanation:

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2 years ago
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Volgvan

Explanation:

Atomic number is defined as the number of an element which represents total number of protons.

When an atom is neutral then it means it contains same number of protons and electrons.

On the other hand, atomic mass is defined as the sum of total number of protons and neutrons present in an atom.

Protons of every element remains fixed because it shows the identity of each element but if we change the number of neutrons then also identity of the atom will remain fixed. This is because changing the number of neutrons will not show any change in number of protons.

For example, ^{2}_{1}H and ^{3}_{1}H are isotopes of hydrogen and they have same number of protons but different number of neutrons.

Thus, we can conclude that number of neutrons can vary without changing the identity of the element.

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Answer:

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2 years ago
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