An atom consists of a fixed number of protons, electrons and neutrons, which makes each element unique. Protons and neutrons together make up thenucleus of an atomwhile the electrons orbit around it. In the periodic table, a chemical element is represented by a fixed format : Atomic number= ...
History of the Periodic Table –1864 John Newlands An English scientist, he put forward his law of octaves He arranged all the elements known at the time into a table in order of relative atomic massrelative atomic mass When he did this, he found that each element was similar to the elem...
What is molar mass in chemistry?Physical Properties of Elements:Every element in the periodic table has unique characteristics and physical properties. These properties govern how elements behave in nature, including how they interact with their surroundings and other chemicals....
Which element is a transition metal? a. Hg b. Tl c. Pb What is the symbol of the element that is in Group IVA and period 3? (a) Ga (b) Ge (c) B (d) Si What is the first element on the periodic table in studying Chemistry?
Someone who is intrigued by the way atoms combine into molecules or who is fascinated by the diversity of elements on the periodic table may want to pursue a degree in chemistry. What Is Chemistry? This field of science offers insight into the ingredients necessary to form various substances ra...
A piece of copper wire contains 5 moles of copper atoms. What is its mass? What is molar mass in chemistry? Molar mass of copper(II) nitrate? What is the molar mass of a substance? What is the molar mass of (NH4)2CO3? An empty crucible has a mass of 25.70 g. After some copper...
Chemistry & Physics A substance composed of atoms having an identical number of protons in each nucleus. Elements cannot be reduced to simpler substances by normal chemical means. See Periodic Table. Essence Such an extract in a solution of alcohol. Element One of four substances, earth, air, ...
(Chemistry) A sequence of elements arranged in order of increasing atomic number and forming one of the horizontal rows in the periodic table. Span A pair of horses or other animals driven together; usually, such a pair of horses when similar in color, form, and action. Period Of, belongin...
Is table salt a compound? What is the molecular formula for salt? What is common to all salts? What is sodium chloride? What is the chemical formula for sea salt? What is a compound in chemistry? What is sodium chloride used for?
What chemical element is Au? Discovery of Elements: The majority of elements found on the periodic table were isolated and identified after the 17th century. While a few were known prior to this, the development of chemistry and physics opened the door to understanding the atomic nature of the...