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No two elements have the same number of protons.
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What is substance in which one or more atoms have the same number of protons ie the same atomic number?
Element
What is a substance in which one or more atoms have the same number of protons or atomic number?
Element
A is substance in which one or more atoms have the same number of protons?
An element is a substance in which all atoms have the same number of protons. Each element is identified by its unique number of protons, known as the atomic number.
What part of the element tells you that it is that element?
You can tell if a substance is an element or not by it's atoms. If it's a pure element, it will only have one type of atom (e.g. Copper atoms). If it's not an element it will have two or more types of atoms in it (e.g. Copper, Carbon and Lithium atoms). You can tell which element an atom is by the amount of electrons it has (atomic number) For Example: Hydrogen: 1 electron: Atomic Number 1 Helium: 2 electrons: Atomic Number 2 Molybdenum: 42 electrons: Atomic Number 42 Seaborgium: 106 electrons: Atomic Number 106
How many atoms are present in one gram atomic mass of a substance?
Well, that depends on what substance it is. There's a way to figure it out, though, for every substance. On the periodic table, the atomic mass number for every element is the number of grams in 1 mole of that substance. 1 mole of every substance contains a constant number of representative particles, 6.02x1023. That's called Avogadro's number, and it's the most important constant in chemistry. Given a mass of a substance, it's a simple matter of finding out the number of atoms. For example, let's say you have 80 grams of calcium (Ca). Calcium's atomic mass is 40, and that means 40 grams per mole. You have 80 grams, so that's 2 moles. 1 mole of anything contains 6.02x1023 particles, so that number times your 2 moles get you 1.2x1024 atoms of calcium.
What substance has one or more atoms or have the same number of protons?
Element
What is a substance which one or more atoms have the same number of protons?
Element
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.
Is copper a compoun or element?
Copper is an element with the chemical symbol Cu and atomic number 29. It is a pure substance made up of copper atoms and is not a compound, which is a substance made of two or more elements chemically bonded together.
Do some atoms have more or fewer protons than will other atoms of the same element?
No. The atomic number of an element is determined by its number of protons. If two atoms have different numbers of protons, they have different atomic numbers and are different elements.
How does the atomic mass measure?
The atomic mass is the average weight of one mole of a substance (6.022 * 10^23 atoms or molecules) in grams. For elements, this is usually around double the number of protons but varies due to isotopes containing more or fewer neutrons.
Are all elements compounds?
No. Elements are composed of atoms that have the same number of protons (atomic number) in their atomic nuclei. Compounds are composed of two or more elements that are chemically combined.
