| Question Answer | Oxygen( atomic number 8) requires how many additional electrons to fill its outer electron shell? 2 | The formula for methane gas is CH4. What does the formula 4CH4 represent? 4 molecules, each containing a carbon and 4 hydrogen atoms |
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What is 4CH4 represent?
Question. Answer. The formula for methane gas is CH4. What does the formula 4CH4 represent?
4 molecules, each containing a carbon and 4 hydrogen atoms
.
What is the smallest stable unit of matter?
The structure of the
atom
.
An atom
is the smallest unit of matter that retains all of the chemical properties of an element.
Which of the following are defined as soluble inorganic compounds whose ions will conduct an electric current in solutions?
| Question Answer | Soluble inorganic compounds whose ions will conduct an electric current in solution electrolytes | ph is measure of the concentration _____ in soulution hydrogen ions | A solution with ph below 7 is acidic | Compounds that stabilize pH by either removing or replacing hydrogen ions are buffers |
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What does the atomic weight represent?
The total weight of an atom is called the atomic weight. It is
approximately equal to the number of protons and neutrons
, with a little extra added by the electrons. The stability of the nucleus, and hence the atom’s radioactivity, is heavily dependent upon the number of neutrons it contains.
What is the molecule for oxygen?
Oxygen is found naturally as a molecule. Two oxygen atoms strongly bind together with a covalent double bond to form dioxygen or
O
2
. Oxygen is normally found as a molecule. It is called dioxygen.
How do atoms behave?
Electrons are attracted to any positive charge by their electric force; in an atom, electric forces bind the electrons to the nucleus. … In some respects, the electrons in an atom behave
like particles orbiting the nucleus
. In others, the electrons behave like waves frozen in position around the nucleus.
What is the basic unit of matter?
In turn,
the atom
is the fundamental unit of matter…, that is, of an element. The number of positively charged protons and neutral neutrons in an atomic nucleus account for most of the mass of an atom.
What are the three basic units of matter?
Atoms are made up of a nucleus, protons and electrons. Atoms are the basic units of matter and the defining structure of elements.
What is the weakest bond?
The ionic bond
is generally the weakest of the true chemical bonds that bind atoms to atoms.
What is the most important fuel molecule in the body?
Carbohydrates, such as sugar and starch, for example, are readily broken down into
glucose
, the body’s principal energy source. Glucose can be used immediately as fuel, or can be sent to the liver and muscles and stored as glycogen.
Are soluble in organic compounds whose solutions will conduct an electric current?
Explanation: In water,
most halides, nitrates, sulfates, and acetates
are soluble. These certainly speciate in solution to give the aquated ion complex, which are capable of carrying a current.
What 3 things does the atomic number tell you?
The three main atomic particles are
protons, neutrons and electrons
. The atomic number of an atom identifies the number of protons in the atom. This is the defining characteristic of an element.
What does atomic number represent?
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).
Why is atomic weight not a whole number?
Because
the atomic weight is an average based on the percentage of atoms of each isotope in the naturally occurring isotopic mixture
(Section 2.6, Example 2.2), atomic weights are not whole numbers even though atomic numbers and mass numbers are whole numbers. Isotopic masses also differ from whole numbers.
Is Dioxygen the same as oxygen?
As nouns the difference between
oxygen
and dioxygen
is that oxygen is a chemical element (symbol o) with an atomic number of 8 and relative atomic mass of 159994 while dioxygen is (chemistry) the normal allotrope of oxygen having two atoms per molecule.
