The atomic number is the number of protons in the nucleus of an atom. The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).... read more ›
Bromine is a chemical element with the symbol Br and atomic number 35. It is the third-lightest halogen and is a volatile red-brown liquid at room temperature that evaporates readily to form a similarly coloured vapour. Its properties are intermediate between those of chlorine and iodine.... continue reading ›
Hydrogen: a chemical element with atomic number 1 and symbol H. It is a colorless, odorless, nonmetallic, tasteless, highly flammable diatomic gas with the molecular formula H2. It has an atomic mass of 1.00794. Hydrogen is the most abundant element in the universe and it has an atomic number of 1 .... continue reading ›
Oxygen is a chemical element – a substance that contains only one type of atom. Its official chemical symbol is O, and its atomic number is 8, which means that an oxygen atom has eight protons in its nucleus. Oxygen is a gas at room temperature and has no colour, smell or taste.... see more ›
The 7 diatomic elements are hydrogen (H), nitrogen (N), oxygen (O), fluorine (F), chlorine (Cl), bromine (Br), and iodine (I). We call them diatomic elements because the atoms appear in pairs. The chemical formulas for these elements are H2, N2, O2, F2, Cl2, Br2, and I2.... view details ›
Because of its high reactivity, bromine naturally occurs as a bromine molecule rather than a single atom. This molecule comprises two bromine atoms that each share one valence electron with the other, forming a covalent bond. Bromine exists in a pure form as a diatomic molecule.... see details ›
Bromine | Br2 - PubChem.... view details ›
Ozone (O3) is a triatomic, molecule, consisting of three oxygen atoms. Ozone in the upper atmosphere protects living organisms by preventing damaging ultraviolet light from reaching the Earth's surface. O3 is the formula for ozone. It has three oxygen atoms.... continue reading ›
The atomic number of an atom is equal to the number of protons in the nucleus of an atom or the number of electrons in an electrically neutral atom. For example, in a sodium atom, there are 11 electrons and 11 protons. Thus the atomic number of Na atom = number of electrons = number of protons = 11.... continue reading ›
Air is a mixture but not compound. Its constituents can be separated. For example: oxygen, nitrogen etc.... read more ›
Bromine compound is a molecule formed when two bromine atoms combine together. Bromine (Br2) is a red-brown liquid at ordinary temperature. It is very volatile. It gives very dense red-brown vapours that are highly toxic to mucous membranes. Bromine is purified from the salts taken from rocks and seawater.... continue reading ›
Iodine is a nonmetallic, nearly black solid at room temperature and has a glittering crystalline appearance.... see details ›
How to Write the Name for Br2 - YouTube... continue reading ›
Read a brief summary of this topic.
|melting point||180.5 °C (356.9 °F)|
|boiling point||1,342 °C (2,448 °F)|
|specific gravity||0.534 at 20 °C (68 °F)|
Beryllium is an element with an atomic number of 4 in the periodic table. It is a bivalent and highly toxic element. The element has one of the highest melting points among the light metals. Beryllium exists in 30 different minerals, among which bertrandite, beryl, chrysoberyl, and phenacite are the most important.... see more ›
It has an atomic number of 6. That means a carbon atom has 6 protons, 6 neutrons, and 6 electrons. Since carbon is in the second row (or second period), it has 2 electron orbits.... view details ›view details ›
carbon (C), nonmetallic chemical element in Group 14 (IVa) of the periodic table. Although widely distributed in nature, carbon is not particularly plentiful—it makes up only about 0.025 percent of Earth's crust—yet it forms more compounds than all the other elements combined.... see more ›
The most common fluorine minerals are fluorite, fluorspar and cryolite, but it is also rather widely distributed in other minerals. It is the 13th most common element in the Earth's crust. Fluorine is made by the electrolysis of a solution of potassium hydrogendifluoride (KHF2) in anhydrous hydrofluoric acid.... see details ›
fluorine (F), most reactive chemical element and the lightest member of the halogen elements, or Group 17 (Group VIIa) of the periodic table. Its chemical activity can be attributed to its extreme ability to attract electrons (it is the most electronegative element) and to the small size of its atoms.... see more ›
Fluorine is a chemical element with symbol F and atomic number 9. Classified as a halogen, Fluorine is a gas at room temperature.... continue reading ›
Chemically, table salt consists of two elements, sodium (Na) and chloride (Cl). Neither element occurs separately and free in nature, but are found bound together as the compound sodium chloride.... see more ›
calcium (Ca), chemical element, one of the alkaline-earth metals of Group 2 (IIa) of the periodic table. It is the most abundant metallic element in the human body and the fifth most abundant element in Earth's crust.... see details ›
The chemical formula for water is H2O, which means each molecule of water consists of one oxygen atom chemically bonded to two hydrogen atoms. Thus, water is a compound.... continue reading ›
Atoms join together to form molecules. A water molecule has three atoms: two hydrogen (H) atoms and one oxygen (O) atom. That's why water is sometimes referred to as H2O. A single drop of water contains billions of water molecules.... continue reading ›
An atom is the part of an element. A particular element is composed of only one type of atom. Atoms are further composed of subatomic particles called electrons, protons and neutrons. Elements can combine with each other to form molecules via chemical reaction.... view details ›
You can have one atom of an element, such as a single gold atom. Or you can have many atoms of an element, such as in a piece of pure gold. In the ordinary oxygen gas you are breathing, two oxygen atoms are bonded to form an oxygen molecule. In ozone, three oxygen atoms are bonded together.... continue reading ›
|ATOMIC NUMBER||ELEMENT||ATOMIC MASS|
- Hydrogen -H.
- Helium -He.
- Lithium -Li.
- Beryllium -Be.
- Boron -B.
- Carbon -C.
- Nitrogen -N.
- Oxygen -O.
We are surrounded by the four classical elements (air, earth, fire, and water) within our environment. They are represented by the wind in our skies, terra firma, warmth from sun rays, and a wide variety of watery resources (seas, rivers, lakes, creeks, and ponds).... see more ›
The idea that these four elements—Earth, Water, Air, and Fire—made up all matter was the cornerstone of philosophy, science, and medicine for two-thousand years.... view details ›
Fire is made up of many different substances, so it is not an element. For the most part, fire is a mixture of hot gases. Flames are the result of a chemical reaction, primarily between oxygen in the air and a fuel, such as wood or propane.... see more ›
Each element has a unique number of protons. An element's atomic number is equal to the number of protons in the nuclei of any of its atoms. The mass number of an atom is the sum of the protons and neutrons in the atom.... read more ›
Because like all things in the world, elements and molecules are both made of atoms. You know elements are all the different types of atoms on the periodic table.... continue reading ›
You can have one atom of an element, such as a single gold atom. Or you can have many atoms of an element, such as in a piece of pure gold. In the ordinary oxygen gas you are breathing, two oxygen atoms are bonded to form an oxygen molecule. In ozone, three oxygen atoms are bonded together.... view details ›
The element Nitrogen has the atomic symbol N and the number 7. It's colorless odorless and tasteless, and at normal conditions, it's a gas. It constitutes 78.1% of Earth's atmosphere. Nitrogen is an element which makes up about 78% of the Earth's atmosphere.... see more ›
Sulphur is made up of only one kind of atom. Therefore it is an element. Other are compounds.... see details ›
A chemical element is a substance that cannot be further broken down by any chemical reaction. Each element has a unique number of protons in its atom. For example, a hydrogen atom has 1 proton, while a carbon atom has 6 protons. Varying the number of electrons in an atom of an element produces ions.... continue reading ›
Examples of atoms include single particles of the elements of the periodic table, such as sodium, uranium, argon, and chlorine.... see more ›
Atoms consist of three fundamental types of particles, protons, electrons and neutrons. Neutrons and protons have approximately the same mass and in contrast to this the mass of an electron is negligible. A proton carries a positive charge, a neutron has no charge and an electron is negatively charged.... see more ›
Each of these parts has an associated charge, with protons carrying a positive charge, electrons having a negative charge, and neutrons possessing no net charge. In accordance with the Standard Model of particle physics, protons and neutrons make up the nucleus of the atom, while electrons orbit it in a “cloud”.... continue reading ›
Each of the 118 known elements has its own chemical symbol — one or two letters that proudly represent the element's name from its box on the periodic table.... read more ›
The atomic number of an atom is equal to the number of protons in the nucleus of an atom or the number of electrons in an electrically neutral atom. For example, in a sodium atom, there are 11 electrons and 11 protons. Thus the atomic number of Na atom = number of electrons = number of protons = 11.... read more ›
An element is a pure substance and is made of only one type of atom; it cannot be broken down into a simpler substance.... continue reading ›
- Carbon dioxide - CO2
- Water - H2O.
- Oxygen we breathe into our lungs - O2
- Sugar - C12H22O11
- Glucose - C6H12O6
- Nitrous oxide - "Laughing gas" - N2O.
- Acetic acid - part of vinegar - CH3COOH.
Nitrogen is an element that can combine with itself or with other elements to make different compounds. For instance nitrogen gas, N2, is a compound made when two nitrogen atoms form a chemical bond. It makes up about 80% of the atmosphere, while oxygen gas, O2, makes up a little less than 20% of the atmosphere.... read more ›
Phosphorus - Element information, properties and uses | Periodic Table.... see details ›