This artificial element exist - ununseptium (temporary named) with the symbol Uus.
It is in "Group 17".
It should belong to group 17
Lithium The element number represents the number of protons in its nucleus. That means the smaller number a element has, the lighter it will be. Lithium is the third element.
The number of the protons in the nucleus of a chemical element is equivalent to the atomic number; the atomic number define the position of this element in the periodic table (group, period). And from these we can suppose the chemical properties of this element.
It should belongs to group 17.
There is no element with 28 protons in group 4. I think you are getting confused with group 4 and PERIOD 4. In period 4, the element with 28 protons is Nickel.
An atom is comprised of a nucleus of protons and neutrons, and layers of 'shells' in which the electrons revolve around the nucleus. An element is defined by the number of protons in the nucleus while the number of electrons on the outer shell define an atoms group on the periodic table. Then the number of neutrons is added to the number of protons to define the atomic weight of the atom.
No. Argon and chlorine are two different elements. Both belong to period 3. But chlorine is a group 17 element (with 17 protons) whereas argon belong to group 18 and has 18 protons.
Lithium The element number represents the number of protons in its nucleus. That means the smaller number a element has, the lighter it will be. Lithium is the third element.
The number of the protons in the nucleus of a chemical element is equivalent to the atomic number; the atomic number define the position of this element in the periodic table (group, period). And from these we can suppose the chemical properties of this element.
The atomic number defines an atom's identity, i.e. element. A group of atoms contatining the same number of protons in their nuclei belong to the same element even if they can have different numbers of neutrons or electrons associated with them. If two atoms have the same number of protons but different number of neutrons, they are called isotopes. If an atom has less or more electrons than its number of protons, it is known as an ion. In certain instances during radioactive decay, the number of protons in an atom's nucleus can actually change. This results in a transmutation (change of one element to another).
It should belongs to group 17.
calciumThe element sulfur's atomic number is 16, so there are 16 protons in its nucleus. The element bromine's atomic number is 35, and there are 35 protons it its nucleus. This means the element will have an atomic number between 16 and 35. Since the question asked which Group 2 element fits in that window, we can go to the Periodic Table and look down the column of Group 2 elements and find that calcium is the element so described. It has the atomic number 20, and that means 20 protons in its nucleus.Remember that the Groups on the periodic table of elements are the vertical columns, and they range from Group 1 to Group 18. Group 2 elements are the so-called Alkaine Earth metals. A link is provided to the Wikipedia post on the periodic table. Bookmark this one, kids! Each element on the table is a hyperlink to the Wikipedia post on that element. Even the Group numbers are hyperlinks to the post on that Group! It just doesn't get any better that that.
Radon (Rn) has the most protons of any element in Group 0 (18) with 86 protons. However, if or when Ununoctium is officially confirmed, that will become the element with most protons in that family, with 118 protons.
There is no element with 28 protons in group 4. I think you are getting confused with group 4 and PERIOD 4. In period 4, the element with 28 protons is Nickel.
calciumThe element sulfur's atomic number is 16, so there are 16 protons in its nucleus. The element bromine's atomic number is 35, and there are 35 protons it its nucleus. This means the element will have an atomic number between 16 and 35. Since the question asked which Group 2 element fits in that window, we can go to the periodic table and look down the column of Group 2 elements and find that calcium is the element so described. It has the atomic number 20, and that means 20 protons in its nucleus.Remember that the Groups on the periodic table of elements are the vertical columns, and they range from Group 1 to Group 18. Group 2 elements are the so-called Alkaine Earth metals. A link is provided to the Wikipedia post on the periodic table. Bookmark this one, kids! Each element on the table is a hyperlink to the Wikipedia post on that element. Even the Group numbers are hyperlinks to the post on that Group! It just doesn't get any better that that.
An atom is comprised of a nucleus of protons and neutrons, and layers of 'shells' in which the electrons revolve around the nucleus. An element is defined by the number of protons in the nucleus while the number of electrons on the outer shell define an atoms group on the periodic table. Then the number of neutrons is added to the number of protons to define the atomic weight of the atom.
The group of protons and electrons are known as nucleons.
The element with 115 protons is arbitrarily named as Ununpentium and it belongs to group 15, nitrogen family.