1. True or false? In an ion the number of protons differs from the number of ele
ID: 807787 • Letter: 1
Question
1. True or false?
In an ion the number of protons differs from the number of electrons.
Once postulated, a scientific theory cannot be altered.
The group 8A elements have very stable electron arrangements.
D. A molecule consists of a positive ion and a negative ion held together by their attractions
E. All atoms of a specific element must have the same mass. F. A compound composed of P and Cl has covalent bonding.
G. The position of an element in the periodic table is determine by its atomic number.
H. Group 7A elements form ions with a -1 charge.
I.All atoms of a specific element have the same number of protons.
J.Most of the elements in the periodic table are nonmetals.
Explanation / Answer
A.) TRUE. Ion is an atom or a molecule in which the total number of electrons is not equal to the total number of protons, giving it a net positive or negative electrical charge
B.) FALSE. Once postulated, a scientific theory can be modified or rejected if it does not fit the new empirical findings
C.) TRUE. The group 8A elements have very stable electron arrangements.this is because the full valence electron shells of these elements make make them extremely stable and unlikely to form chemical bonds because they have little tendency to gain or lose electrons.
D.) TRUE. A molecule consists of a positive ion and a negative ion held together by their attractions
E.) FALSE. Although all atoms of a given element must have the same atomic number, they need not all have the same mass number.
F.) TRUE.
G.) TRUE. The position of an element in the periodic table is determine by its atomic number. i.e. number of protons in nucleus
H.) TRUE. Group 7A elements form ions with a -1 charge.
I.) TRUE. All atoms of a specific element have the same number of protons.
J.) FALSE. Most of the elements in the periodic table are metals.
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