What does the formula 4CH4 represent?
anatomy ch2QuestionAnswerThe formula for methane gas is CH4. What does the formula 4CH4 represent?4 molecules, each containing a carbon and 4 hydrogen atomsIn an ionic bond, the electron donor is the __ whereas the electron acceptor is the __cation; anion160 more rows
What's a superscript in chemistry?
The atomic number is written as a subscript on the left of the element symbol, the mass number is written as a superscript on the left of the element symbol, and the ionic charge, if any, appears as a superscript on the right side of the element symbol.
What are molecules in chemistry?
(MAH-leh-kyool) The smallest particle of a substance that has all of the physical and chemical properties of that substance. Molecules are made up of one or more atoms.
What removes hydrogen ions and what releases hydrogen ions?
Thus, a base removes hydrogen ions and an acid releases hydrogen ions.
What does 2+ mean in chemistry?
Save this answer. Show activity on this post. Ba2+ means that you have a Barium ion with two positive charges. so the 2 counts the positive charges and the + is not the symbol to add something, the + means only a positive charge.
What do the subscripts and superscripts mean?
A superscript or subscript is a number, figure, symbol, or indicator that is smaller than the normal line of type and is set slightly above it (superscript) or below it (subscript).
Who discovered atom?
John Dalton (1766-1844), a great chemist, really started the modern atomic hypothesis. His atom however was like a solid billiard ball.
What is called atom?
An atom is a particle of matter that uniquely defines a chemical element. An atom consists of a central nucleus that is surrounded by one or more negatively charged electrons. The nucleus is positively charged and contains one or more relatively heavy particles known as protons and neutrons.
What are 3 types of molecules?
Molecules are of three types: Molecule of an atom, Molecule of an element and Molecule of a compound.
When the electrons located in the outermost electron shells of atoms interact What is formed?
The second way for an atom to obtain an octet of electrons is by sharing electrons with another atom. These shared electrons simultaneously occupy the outermost shell of more than one atom. The bond made by electron sharing is called a covalent bond.
When the pH rises above 7.45 a state of what exists?
A pH below 7.35 is an acidemia, and a pH above 7.45 is an alkalemia.
When the blood becomes acidic and bicarbonate ions have been depleted?
Metabolic acidosis occurs when the blood is too acidic (pH below 7.35) due to too little bicarbonate, a condition called primary bicarbonate deficiency. At the normal pH of 7.40, the ratio of bicarbonate to carbonic acid buffer is 20:1. If a person's blood pH drops below 7.35, then he or she is in metabolic acidosis.
What is a superscript example?
Superscript is the small letter / number above a particular letter / number. An example of superscript is 25. The number 5 above the number 2 is an example of superscript.
Why do Chemist use superscripts?
At times, chemical formulas need superscript numbers and symbols to give information about the weight and charge of atoms involved in a chemical reaction.
How do you superscript in mastering chemistry?
Enter the plus sign (+) after the caret (for superscript). For example, to represent a hydrogen atom missing its electron (H+), type H^+. To indicate a NEGATIVE ion: Enter a minus sign (-) after the caret (for superscript).
What is a subscript used for in chemistry?
The number of atoms of each kind is indicated by a subscript following the atom. If there is only one atom, no number is written. If there is more than one atom of a specific kind, the number is written as a subscript following the atom.