b. exposure to toxic chemicals
c. the net charge of the atom
d. the attraction of protons to electrons
e. an unstable ratio of protons and neutrons
The answer is: e. an unstable ratio of protons and neutrons.
Neutrons stabilize the nucleus, because they attract protons and reduce electrical repulsion between protons.
The larger is neutron-proton ratio, the higher is probability for nuclear decay.
Ratio of protons to neutrons in a stable atom is 1 : 1.
For example, nitrogen atom (N-14) has 7 protons (p⁺) and 7 neutrons (n°). The neutron–proton ratio (N/Z ratio or nuclear ratio) is 7 : 7 ( 1 : 1 ).
Another example, neon atom (Ne-20) has 10 protons (p⁺) and 10 neutrons (n°). The neutron–proton ratio is 10 : 10 ( 1 : 1 ).
The neutron–proton ratio generally increases with increasing atomic number.
A single replacement reaction is a type of chemical reaction in which one element replaces another in a compound. A common example of this is when zinc replaces hydrogen in hydrochloric acid to create zinc chloride and hydrogen gas.
A single replacement reaction is a chemical reaction in which one element replaces another element in a compound. This type of reaction can be represented as follows: A + BC -> AC + B. In this equation, 'A' is the single element that replaces 'B' in the compound 'BC', forming the new compound 'AC' and releasing 'B' as a separate element.
For example, one common single replacement reaction occurs when zinc replaces hydrogen in hydrochloric acid to form zinc chloride and hydrogen gas. This reaction can be written as: Zn + 2HCl -> ZnCl2 + H2.
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b. niobium bromite
c. sodium bromide
d. niobium bromide
Answer:
C. Sodium Bromide
C₃H₈ + 5O₂ = 3 CO₂ + 4 H₂O
44.1 g ----------- 4* 18.02 g
? g --------------- 75 g
mass of C₃H₈ = 75 * 44.1 / 4 * 18.02
mass of C₃H₈ = 3307.5 / 72.08
= 45.886 g of propane