Answer:
the word subcellular means contained within a cell. at a level of organization lower than the cellular.
Explanation:
The Earth, Mars or Jupiter should be denser than the Sun. Density is defined by mass and volume — components of object or matter. Although the sun is huge, it’s component is made up of mostly gas (hydrogen and helium). While Earth, though smaller than the Sun, contains heavier elements such as iron, sulfur, rocks, sediments, granite, basalt and water. Mars (composed of rocks and nutrients) and Jupiter (contains gases and compounds) as well are denser when compared to the Sun’s density. Referencing to our basic understanding of matter: solid and liquid should be heavier than gas.
<h2>
Required Answer :- </h2>
- In the question it is asked how many numbers of protons are present in a sodium atom.
- We know that the atomic number of sodium is 11.
- Sodium atom means it is in its neutral state, the neutral sodium atom has no charge on it.
- We know that the atomic number of an element is always equal to the number of protons for the particular element.
- Therefore the atomic number of sodium is 11 and the number of protons in sodium are 11.
<h3>Additional information :- </h3>
- If we know the atomic number of an element then only we can find the number of protons, neutrons and electrons present in it. The number of electrons in an element is equal to the atomic number of the respective element
- The atomic weight of the sodium is 23.
- The number of neutrons in sodium = Atomic weight of sodium – number of protons in sodium
= 23 – 11 = 12.
- So, the number of neutrons in sodium is equal to 12.
- The number of electrons in sodium is equal to the atomic number of sodium. Then the number of electrons in sodium is equal to 11.
- Therefore the number of protons, neutrons and electrons in sodium are 11, 12 and 11 respectively.
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The answer is b
the slow down because of the change of form into solid and they pack together to form the solid
Answer:
1) B
2) D
3) A
4) Ga
5) K
6)Po
7) Atomic size increases down the group
8) B<Al<Ga<In<Tl
9)Se<C<Ga
10) ionization energy is the energy required to remove electrons from the outermost shell of an atom.
Explanation:
In the periodic table, the properties of elements reoccur ''periodically'' throughout the table, hence the name 'periodic table'.
Ionization energy increases across the period hence the noble gas He has the highest ionization energy.
Since ionization energy increases across the period, group 1 elements possess the lowest ionization energy.
Since atomic size increases down the group and decreases across the period, gallium is smaller than indium, potassium is smaller than caesium, polonium is smaller than titanium and iodine is larger than bromine.
This explanation above justifies the order of increasing atomic radius of group 13 elements shown in answer number 8 above.
Since atomic size decreases across the period, the order of increasing atomic size shown in answer number 9 above is correct.
Ionization energy is the energy required to remove electrons from the outermost shell of an atom.
