The correct answer is B. Isotopes
Explanation:
Chemical elements are defined according to their proton number (particles positively charged), for example, in hydrogen, the atomic number is 1. Also, atoms of the same element usually have the same number of electrons (particles negatively charged) if the atom is neutral.
However, atoms of the same element can differ in the number of neutrons and therefore there are atoms with the same number of protons and electrons but not the same number of neutrons, these are known as isotopes. This variety in neutrons affects the properties of the atom such as reactivity. For example, hydrogen has three isotopes: tritium, deuterium, and protium and form this tritium is the more radioactive.
An isthmus can exist between two large landforms or between an island and a larger landform or continent. It is any narrow connecting neck of land.
A tombolo is a sandbar that connects the mainland to an island, forming a permanent or temporary isthmus, and the island can be known as a "tied island". Tombolo's form from sand or sediment pushed along a shoreline.
The primary function of meiosis is to produce gametes (sperm and eggs).
False that would be a physical change bc a chemical change is when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances
The items needed to complete a circuit include the following:
<h3>Functions of the parts of a Circuit.</h3>
The wire helps in the distribution of the electric current from the power
source in order to ensure it gets to the load.
The battery contains compounds which is responsible for providing the
energy required to power up the load.
The load could be a bulb, fan etc and is the final destination of the electric
current. The electric current powers up the load and makes it functional.
The switch helps to regulate the flow of electric current and has an 'on and
off button' to prevent energy wastage when not in use.
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