Nuclear decay is the decay of atoms on the atomic scale. “Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive. Three of the most common types of decay are alpha decay, beta decay, and gamma decay, all of which involve emitting one or more particles or photons.”
Answer: colloid
Explanation:
Colloids are solutions in which small sized particles are suspended throughout the solution as they do not settle own their own. Colloids are defined as the mixtures where the size of the particle is within the range of 2nm to 1000 nm. In these mixtures, physical boundary is seen between the dispersed phase and dispersed medium.
Colloids are solutions with particle size intermediate between true solutions and suspensions. Suspensions have large sized particles which settle when left undisturbed for sometime and thus can be filtered off easily. The particle size in colloids is less and hence they do not settle under the effect of gravity.
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Answer:
Explanation:
An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.
All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.
Isotopic notation: Protons Neutrons Electrons
¹⁹⁷₇₉Au 79 118 79
Solution:
p+n = atomic mass = 79+118 = 197
e = 79 (atomic number) so the element with atomic number Au.
Isotopic notation: Protons Neutrons Electrons
⁷⁹₃₅Br 35 44 35
Solution:
Number of neutrons = atomic mass - number of protons= 79-35 = 44
Number of protons and electrons are equal so number of electrons are 35.
Isotopic notation: Protons Neutrons Electrons
¹²⁷₅₃I 53 74 53
Solution:
The atomic number of iodine is 53.
Number of neutrons = atomic mass - number of protons= 127-53 = 74
Number of protons and electrons are equal so number of electrons are 53.
Isotopic notation: Protons Neutrons Electrons
⁵⁶₂₆Fe 26 30 26
Solution:
The atomic number of iron is 26.
atomic mass = n+p= 26+30= 56
Number of protons and electrons are equal so number of electrons are 26.
C. force because the force able to communicate to a mass of one kilogram an accerelation of 1m/s²
Kg.m
F= -------------
S²
