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A sample of calcium contains calcium -40 calcium -44 calcium -42 calcium -48 calcium -43 and calcium -46 atoms Explain why these atoms can have different mass numbers bu the must have the same atomic?
The number of protons in an atom determines its atomic number, which is the same for all calcium atoms (20). The mass number of an atom is the sum of its protons and neutrons. The different mass numbers for these calcium atoms are due to variations in the number of neutrons, resulting in isotopes of calcium.
What term is used to describe the '4' in 4Ca?
4 is here the number of molecules of calcium nitrate.
How many atoms do Ca have?
There are 20 protons in a calcium atom. You can find the number of atoms in any element by looking at the atomic number which is in the top right corner of the element's box on the periodic table. e.g. Ca 20 40.078
How many atoms are in 175 g of calcium?
To find the number of atoms in 175 g of calcium, we need to first calculate the number of moles of calcium using its atomic mass (40.08 g/mol). Then, we can use Avogadro's number (6.022 x 10^23 atoms/mol) to convert moles to atoms. Finally, multiply the number of moles by Avogadro's number to get the total number of atoms in 175 g of calcium.
How many protons neutrons and electrons are in an atom of calcium-42?
Calcium has atomic number 20, which means that all calcium atoms have 20 protons in their atomic nuclei. Neutral calcium atoms also have 20 electrons. Isotopes of calcium vary in the number of neutrons in their atomic nuclei, and are named for their mass number, which is the sum of the protons and neutrons in the nucleus. You can calculate the number of neutrons (N) in an isotope by subtracting the number of protons (atomic number) from the mass number. N = 42 - 20 = 22, therefore, a calcium-42 isotope has 20 protons, 20 electrons, and 22 neutrons.
What word can you use to describe two kinds of calcium atoms?
The word "isotopes" can be used to describe two kinds of calcium atoms. Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons, resulting in different atomic masses. For example, calcium-40 and calcium-42 are two isotopes of calcium.
What is calcium carbonates atomic number?
It is a compound. Only atoms have atomic number. Elements have their own atomic number.
Which has more atoms 10 moles of carbon or 10 moles of calcium?
10 moles of calcium has more atoms than 10 moles of carbon, as calcium has a higher atomic number and atomic weight compared to carbon. Each mole contains Avogadro's number of atoms, so the element with the larger atomic weight will have more atoms in 10 moles.
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 element's neutral atoms have 20 protons?
it is about the atomic number. Calcium is the element.
What does atoms of every isotope of calcium have the same?
All isotopes of calcium have the same number of protons in their nucleus, which is 20. However, they differ in their number of neutrons, leading to different atomic masses.
How many atoms are in 127 g of calcium?
The gram atomic mass of calcium is 40.08. Therefore, 127 g of calcium constitutes 127/40.08 or 3.69 gram atomic masses. By definition of Avogadro's Number, each gram atomic mass contains Avogadro's Number of atoms. Therefore, the answer is 3.69 X Avogadro's Number or 1.91 X 1024 atoms, to the justified number of significant digits.
A sample of calcium contains calcium -40 calcium -44 calcium -42 calcium -48 calcium -43 and calcium -46 atoms Explain why these atoms can have different mass numbers bu the must have the same atomic?
The number of protons in an atom determines its atomic number, which is the same for all calcium atoms (20). The mass number of an atom is the sum of its protons and neutrons. The different mass numbers for these calcium atoms are due to variations in the number of neutrons, resulting in isotopes of calcium.
How many atoms are in one gram of calcium?
To work this out you need to know the atomic weight of calcium and Avogadros number, which is the number of atoms in a gram atom. Calcium has an atomic weight of 40.078. Therefore a gram ato is 40.078 grams which contains 6.02214129(27)×1023 atoms. 1g of calcium contains 6.02214129(27)×1023 / 40.078 1.502 X 1022
How do you find out how many atoms are present in calcium?
To find out how many atoms are present in calcium, you would need to use Avogadro's number, which is 6.022 x 10^23 atoms/mol. Simply divide the mass of the calcium sample by the atomic mass of calcium (40.08 g/mol) and then multiply by Avogadro's number to determine the number of atoms present.
What is metal with 20 electrons?
The metallic element whose atoms contain 20 electrons each is calcium, with atomic number 20. (The number of electrons in a neutral atom always matches the number of protons, which is the definition of atomic number.)
How many atoms are in 115 grams of Calcium?
Avogadro's Number, 6.022 x 1023 gives the number of atoms in one mole. Calcium has an average atomic weight of 40.08 gmol-1 So one mole weighs 40.08 grams. 115 grams of Calcium will have (6.022 x 1023 / 40.08)*115 = 1.73 x 1024 atoms.
