The model below shows an atom of an element. 9 light grey and 8 dark grey balls sit at the center with 2 concentric black rings around them. the inner ring has 2 medium grey balls on it, and the outer ring has 6 medium grey balls on it. at bottom, a dark grey ball = +1, a light grey ball = 0, a medium grey ball = negative 1. what is the atomic number of this atom? 6 8 9 16

sorry if this is a bit late but i know what your talking about and your answer would be 8

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Option (b) is the correct answer.

Explanation:

As it is given that a dark grey ball has +1 charge. This means that it is a proton. And, a light grey ball has has 0 charge. This means it is a neutron.

Whereas a medium grey ball has -1 charge. This means that it is an electron.

As it is known that in a neutral atom the number of protons equal to the number of electrons.

Since, no overall charge is present on the given model of atom. Hence, the atom is neutral in nature.

Also, atomic number is the sum of total number of protons present in an atom. So, in the given atom total number of protons is 8, total number of neutrons is 9, and total number of electrons is also 8.

Thus, we can conclude that the atomic number of given atom is 8.

mechanics (greek   is that area of science concerned with the behaviour of physical bodies when subjected to forces or displacements, and the subsequent effects of the bodies on their environment. the scientific discipline has its origins in ancient greece with the writings of aristotle and archimedes[1][2][3] (see history of classical mechanics and timeline of classical mechanics). during the early modern period, scientists such as galileo, kepler, and newton laid the foundation for what is now known as classical mechanics. it is a branch of classical physics that deals with particles that are either at rest or are moving with velocities significantly less than the speed of light. it can also be defined as a branch of science which deals with the motion of and forces on objects. the field is yet less widely understood in terms of quantum theory.

explanation:

no, the red giant is the hottest with 2.00.000.000 degrees celsius. while the white dwarf only 25,000 degrees celsius.