A ring made of pure gold would be made of millions upon millions of atoms, each having 79 protons in its nucleus and thus having the same atomic number. It is also fair to say that an element is a type of atom. On the periodic table, atoms are classified into different elements based...
Elements is a pure substance and the atoms of the same element have the equal number of proton in their nuclei. They are simpler substances and can not be further broken down.Answer and Explanation: A modern periodic table consists of 18 columns known as groups and 7 rows known as peri...
With the exception of hydrogen, the elements on the left-hand side of the periodic table aremetals. Actually, hydrogen acts as a metal, too, in its solid state, but the element is a gas at ordinary temperatures and pressures and does not display metallic character under these conditions. Me...
Find and label protons. The protons are always in the nucleus, always have a positive charge (label them with a "P" or a "+"), and there are always the same number of protons as the atomic number of the element. Example: What is the atomic number of gold? It is 79. So a gold...
The surface of the sintered compact has a first coating layer comprising at least one kind of a noble metal, a group 4a element of the periodic table of elements and a group 5 element of the periodic table of elements and further a second coating layer comprising a compound composed of at...
Since an ion cannot remain in a free state all by itself it must combine with another element(s) to form a compound. Chloride (Cl-) is therefore a by-product of the reaction between chlorine (Cl) and an electrolyte such as sodium (Na). Hence, sodium chloride (NaCl) is known as an...
A transducer is an electronic device that converts energy from one form to another. Transducers help determine the exact magnitude of physical forces such as temperature and pressure.
The two main parts of an atom present in an element are: nucleus and the outer region. Presence of protons and neutrons is observed in this region...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your ...
Parts_10分析和总结分析和总结.pdf,New Way Chemistry for Hong Kong A-level Suggested Solutions for GCE Questions Part 10 Periodic Properties of the Elements in the Periodic Table (Book 4, p.37 – p.38) 22. (a) 1s 2s 2p 3s 3p 3d 4s 4p 4d 4f 5s 5p Ge 2 2 6 2
Most historians credit William Gregor for the discovery of titanium. In 1791, he was working with menachanite (a mineral found in England) when he recognized the new element and published his results. The element was rediscovered a few years later in the ore rutile by M. H. Klaproth, a...