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What parts of an atom are equal to each other?
It depends on what you mean by what parts are equal. Protons and electrons both have the same magnitude of charge with opposite signs and electrons are much less massive than protons. Protons and neutrons are approximately equal in mass but protons have a charge of +e Coulombs while neutrons have a charge of 0. Atoms can often exist with unequal numbers of protons and electrons. Such atoms are called ions and have a negative charge if they have more electrons than protons and positive charge if they have more protons than electrons.
If a group of pupils found that if one of them scores 9 marks more in their maths test her average score is 81 but if one of them scores 3 marks less the average score is 78 how many pupils are there?
group
Is the sum of the numbers of protons and the number neutrons in an atom is the mass number?
It is the mass number for that particular form of the atom - that particular isotope. An element can exist as more than one isotope and the atom's mass number is the (weighted) average of the mass numbers of all its isotopes.
Why is an elements atomic mass not listed as a whole number on the table?
There are two main reasons. The first is that the masses of protons and neutrons are not 1 unit but slightly greater. The mass of an atom is the mass of a whole number of protons, a whole number of neutrons as well as the same number of electrons as protons. Overall, therefore, the mass should be greater than the number of protons and neutrons (electrons have very little mass). But some of the mass is converted to energy which is used to hold the positively charged nucleus together. As a result the mass of carbon12 is an exact whole number and that is the only element for which that is true.The second, and possibly more relevant reason is that most atoms are found in the form of isotopes which have different numbers of neutrons and so different masses. The atomic mass listed for an element is an average of the masses of all these isotopes, weighted together according to their abundance of earth.
Why 4-nitrophenol more polar than 2-nitrophenol?
4-Nitrophenol is more polar than 2-nitrophenol primarily due to the positioning of the nitro group relative to the hydroxyl group. In 4-nitrophenol, the nitro group is located para to the hydroxyl group, allowing for effective resonance and dipole interactions that enhance polarity. In contrast, in 2-nitrophenol, the nitro group is ortho to the hydroxyl group, where steric hindrance and less effective resonance diminish the overall polarity. As a result, the intermolecular forces in 4-nitrophenol are stronger, contributing to its increased polarity.
What element has more than 50 but less than 75 protons and is in group 17?
Any one element can ONLY have a single fixed number of protons. Th only element with a number of protons that sits between 50 and 75 in group 17 of the periodic table is Iodine (I), with 53 protons.
What alkaline earth metal has more protons then argon but less protons then krypton?
This chemical element is calcium (Ca).
What element in group 16 has more protons than sodium but fewer protons than argon?
The element in group 16 with more protons than sodium but fewer protons than argon is sulfur (S). Sodium has 11 protons, sulfur has 16 protons, and argon has 18 protons.
Does a isotope of a element have more protons?
All isotopes of an element have the same number of protons, otherwise they would not be the same element. What varies is the number of neutrons, they can be more or less than in the stable isotope(s) of the element.
What element has more than 50 but less than 75 protonsand it is in group 17?
That would be iodine with an atomic number of 53. The next group 17 element is astatine with atomic number 85.
Which group 2 element has fewer protons than bromine but more protons than sulfur?
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.
What is the element that has more protons of any element in group 15?
The expected answer is element 115, Ununpentium, if that has been discovered. Among stable elements, the answer would be bismuth.
What element in group 16 has more protons than sodium but fewer than Aragon?
Sulfur (S)
Which element has more protons in the nucleus of sodium?
Sodium is an element itself, it has no elements inside.
What element has 2 more protons than oxygen?
The element with 2 more protons than oxygen is sulfur. Oxygen has 8 protons, while sulfur has 16 protons.
This group 2 element has fewer protons than bromine but more protons than sulfur what element is it?
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.
Is tin a element that has more protons in the nucleus of its atoms or is lead a element that has more protons in the nucleus of its atoms?
Lead has more protons in the nucleus of its atoms compared to tin. Lead has 82 protons while tin has 50 protons in its nucleus.
