AnswersDriveNumber of electrons in each shell
| Element | Symbol | Electrons in shell 1 |
|---|---|---|
| Hydrogen | H | 1 |
| Helium | He | 2 |
| Lithium | Li | 2 |
| Beryllium | Be | 2 |
Which element has the highest atomic number?
The elemenents of the periodic table sorted by atomic mass
| Atomic Mass | Name chemical element | Atomic number |
|---|---|---|
| 1.0079 | Hydrogen | 1 |
| 4.0026 | Helium | 2 |
| 6.941 | Lithium | 3 |
| 9.0122 | Beryllium | 4 |
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What are the symbols of the first 20 elements?
First 20 Elements of the Periodic Table and Their Symbols
- Hydrogen. H.
- Helium. He.
- Lithium. Li.
- Beryllium. Be.
- Boron. B.
- Carbon. C.
- Oxygen. O.
- Nitrogen. N.
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What are the first 30 elements?
The first 30 elements of the periodic table and their symbols
| A | B |
|---|---|
| Helium | He |
| Lithium | Li |
| Beryllium | Be |
| Boron | B |
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What are the uses of the first 20 elements?
First 20 Elements Uses
- Hydrogen. water.
- Helium. ballons.
- Lithium. batteries.
- Beryllium. nuclear reactor.
- Boron. heat restitant materials.
- Carbon. photosynthesis.
- Nitrogen. cooling.
- Oxygen. respiration.
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What are first 20 elements in periodic table?
First 20 Elements
- H. Hydrogen (1)
- He. Helium (2)
- Li. Lithium (3)
- Be. Beryllium (4)
- B. Boron (5)
- C. Carbon (6)
- N. Nitrogen (7)
- O. Oxygen (8)
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What are the 10 elements of the periodic table?
First ten elements on the periodic table
- Hydrogen. H.
- Helium. He.
- Lithium. Li.
- Beryllium. Be.
- Boron. B.
- Carbon. C.
- Nitrogen. N.
- Oxygen. O.
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What is the last element on the periodic table?
As of 2016, the periodic table has 118 confirmed elements, from element 1 (hydrogen) to 118 (oganesson). Elements 113, 115, 117 and 118, the most recent discoveries, were officially confirmed by the International Union of Pure and Applied Chemistry (IUPAC) in December 2015.
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What are the first 40 elements?
First 40 Element Symbols
- Hydrogen. H.
- Helium. He.
- Lithium. Li.
- Beryllium. Be.
- Boron. B.
- Carbon. C.
- Nitrogen. N.
- Oxygen. O.
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What are the names of the first 36 elements?
The first 36 elements of the periodic table
- H – Hydrogen.
- He – Helium.
- Li – Lithium.
- Be – Beryllium.
- B – Boron.
- C – Carbon.
- N – Nitrogen.
- O – Oxygen.
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What are the first 18 elements in the periodic table?
The First 18 Elements Of The Periodic Table
- Hydrogen. H 1.
- Helium. He 2.
- Lithium. Li 3.
- Beryllium. Be 4.
- Boron. B 5.
- Carbon. C 6.
- Nitrogen. N 7.
- Oxygen. O 8.
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Which elements are named after countries?
1. Elements named after Countries or Places
| Americium | Am | Made in 1945 at Chicago USA |
|---|---|---|
| Gallium | Ga | Named after the Latin name for France - Gallia |
| Germanium | Ge | Discovered in 1886 by a German Chemist - Winkler. |
| Polonium | Po | Discovered in 1898 by Marie Curie, who was Polish. |
| Scandium | Sc | Discovered and mined in Scandinavia |
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What is the center of an atom?
An atom itself is made up of three tiny kinds of particles called subatomic particles: protons, neutrons, and electrons. The protons and the neutrons make up the center of the atom called the nucleus and the electrons fly around above the nucleus in a small cloud.
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What is the first element?
Hydrogen is the first element on the periodic table. It's also the most abundant element in the universe.
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What is the Centre of an atom?
Atoms contain three sub-atomic particles called protons, neutrons and electrons. The protons and neutrons are found in the nucleus at the centre of the atom. The nucleus is very much smaller than the atom as a whole. The electrons are arranged in energy levels around the nucleus.
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How the elements in the periodic table are arranged in terms of electrons?
The number of protons in the atom of an element determines its place in the Periodic Table. The number of electrons in an atom is the same as the number of protons. These electrons are arranged in shells or 'energy levels' around the nucleus.
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What is an element in science?
An element is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms containing a single proton and a single electron. If you change the number of protons an atom has, you change the type of element it is. Currently, scientists know of 118 different elements.
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What is the second element on the periodic table?
The rows are called PERIODS and the columns are called GROUPS. Hydrogen (H) is the first element in the periodic table because it has just one proton in its nucleus. Helium (He) is second, because it has two protons, and so on.
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What is the atomic number of an element?
Atomic number is the number of protons, and therefore also the total positive charge, in the atomic nucleus. The Rutherford–Bohr model of the hydrogen atom (Z = 1) or a hydrogen-like ion (Z > 1).
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What does an atomic number of an element tell you?
The full chemical symbol for an element shows its mass number at the top, and its atomic number at the bottom. This symbol tells you that the chlorine atom has 17 protons. It will also have 17 electrons, because the number of protons and electrons in an atom is the same.
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What does the atomic number of an element tell you?
It is traditionally represented by the symbol Z. The atomic number uniquely identifies a chemical element. In an atom of neutral charge, atomic number is equal to the number of electrons. The atomic number is closely related to the mass number, which is the number of protons and neutrons in the nucleus of an atom.