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Which two elements have an atomic mass less than twice their atomic number?
Elemental hydrogen and helium have atomic masses less than twice their atomic numbers.
Why Mg atom is twice havier thanC atom?
A magnesium (Mg) atom is not actually twice as heavy as a carbon (C) atom; rather, it has a greater atomic mass due to its greater number of protons and neutrons. Magnesium has an atomic number of 12, meaning it has 12 protons, while carbon has an atomic number of 6, with 6 protons. The atomic mass of magnesium is approximately 24 u (atomic mass units), while carbon is about 12 u. Thus, magnesium is roughly twice as heavy as carbon, but this is due to its larger atomic structure and the presence of additional neutrons, not simply the number of protons.
How do you know the number of protons electrons and neutrons in the 1st 20 elements?
Look at the periodic table.The bottom number on an element is the number of protons. The number of electrons will be the same. Subtract the bottom number from the top number to get the number of neutrons. e.g: 103 Rh 45 Protons= 45 Electrons= 45 Neutrons= 58 (103-45)
How atomic Mass can be compared with atomic mass of carbon?
Atomic mass is typically expressed relative to a standard reference, which is commonly carbon-12. The atomic mass of an element is determined by the average mass of its isotopes, weighted by their natural abundance, and is usually compared to the atomic mass of carbon, which is defined as exactly 12 atomic mass units (amu). Thus, when we say an element has an atomic mass of, for example, 24 amu, it means it is twice as heavy as carbon-12. This comparison helps in understanding the relative mass of different elements in relation to a stable and widely recognized standard.
What does the mass number indicates in an element?
The atomic number (or mass number) is the proton number (the number of protons in the nucleus) added to the number of neutrons in the nucleus. The atomic mass is, for stable isotopes, roughly twice that of the proton number although the higher the proton number is the more the number of neutrons increases but this is most apparent in the very heavy elements. It is mainly useful in the use of decay equations as the neutrons lead to the stability of the atom so, when the atomic mass is above or below normal the atom can become unstable and is likely to undergo radioactive decay.
Which two elements have an atomic mass less than twice their atomic number?
Elemental hydrogen and helium have atomic masses less than twice their atomic numbers.
Its atomic number is twice that of aluminum?
The element with an atomic number twice that of aluminum (13) is magnesium, which has an atomic number of 12.
What number atomically links nickel with silicon approximately?
The atomic number of nickel (28) is twice that of silicon. (Atomic number is the number of protons in the nucleus and is equal to the number of electrons in the neutral atom.
Which elements atoms have twice the number of protons in oxygen?
Sulfur.
Why Mg atom is twice havier thanC atom?
A magnesium (Mg) atom is not actually twice as heavy as a carbon (C) atom; rather, it has a greater atomic mass due to its greater number of protons and neutrons. Magnesium has an atomic number of 12, meaning it has 12 protons, while carbon has an atomic number of 6, with 6 protons. The atomic mass of magnesium is approximately 24 u (atomic mass units), while carbon is about 12 u. Thus, magnesium is roughly twice as heavy as carbon, but this is due to its larger atomic structure and the presence of additional neutrons, not simply the number of protons.
How do you know the number of protons electrons and neutrons in the 1st 20 elements?
Look at the periodic table.The bottom number on an element is the number of protons. The number of electrons will be the same. Subtract the bottom number from the top number to get the number of neutrons. e.g: 103 Rh 45 Protons= 45 Electrons= 45 Neutrons= 58 (103-45)
What does the mass number indicates in an element?
The atomic number (or mass number) is the proton number (the number of protons in the nucleus) added to the number of neutrons in the nucleus. The atomic mass is, for stable isotopes, roughly twice that of the proton number although the higher the proton number is the more the number of neutrons increases but this is most apparent in the very heavy elements. It is mainly useful in the use of decay equations as the neutrons lead to the stability of the atom so, when the atomic mass is above or below normal the atom can become unstable and is likely to undergo radioactive decay.
The atomic number of neon is 10 the atomic number of calcium is 20 compared with a mole of neon a mole of calicum contains?
A mole of any element contains Avogadro's number of atoms, which is approximately 6.022 x 10^23 atoms. So, a mole of calcium (atomic number 20) will contain twice the number of atoms as a mole of neon (atomic number 10), as the atomic number corresponds to the number of protons in an atom.
What mass of gold contains twice as many atoms as 2.74g of silver?
The gram atomic mass of silver is 107.868 and that of gold is 196.967. Equal numbers of gram atoms of different elements contain equal numbers of atoms. Therefore, the mass of gold required to contain twice as many atoms as 2.74 g of gold is (2 X 2.74 X 196.967)/107.868 or 10.0 g of gold, to the justified number of significant digits.
Why is it important that sex cells have exactly the number of chromosomes as the body cells?
The DO NOT "have exactly the number of chromosomes as the body cells", they have 1/2 that number. This is so that when two sex cells come together to form an embryo, the cells of that embryo have exactly the same number of chromosomes as the body cells of the two parents and not twice that number.
Which element is thousands time greater than uranium?
It is not clear what "greater" means. In terms of atomic number (number of protons in the nucleus) there is not even an element which is twice as great.
How many of the first twenty elements in the periodic table have isotopes?
19 ------------------------------------------- Actually all elements have isotopes. Isotopes are atoms that have different amount of neutrons. If you ever notice the atomic mass of an atom, it is the average atomic mass of all isotopes. If an atom had no isotope then that number would be an integer.
