What is the symbol for magnesium

Answer : Option A) A positively charged pith ball and a negatively charged glass rod

Explanation : The pair of items that will be attracted by one another is a positively charges pith ball and a negatively charged glass rod.

According to the charge interactions rule, it is state that opposite charges always attract each other and like charges repel each other.

When opposite charges come near to each other there is a pull generated to get attracted, like a north and south pole of a magnets.

whereas when like charges are brought together they try to push each other in opposite direction, like north-north pole of magnets or south-south pole of magnets.

In the given example the pith ball is having positive charge which when brought near the negatively charged glass rod gets attracted.

Answer: The correct answer is Option b.

Explanation:

Water is the compound which is formed by the covalent bonding of hydrogen and oxygen atoms. The chemical formula for this compound is

Self-ionization of water is defined as the process in which 2 water molecules react together to produce hydroxide ion and hydronium ion.

The equation for the self ionization of water molecule follows:

By Stoichiometry of the reaction:

2 moles of water molecules react together to produce 1 mole of hydronium ion and 1 mole of hydroxide ion.

Hence, the correct answer is Option b.

The correct answer is False

Explanation:

A limiting factor refers to a condition that stops or limits the growth of a population of any species. Some of these factors include the availability of sources such as food, shelter or water; predation; natural weather conditions; natural disasters; and competence.

The previous idea implies food is not the only factor or condition that would stop or limit the growth of a population but there are many other factors that could prevent a population from growing too large, this includes abiotic factors (nonliving condition) such as weather and biotic factors (living condition) such as competition with other species or individuals or predation.

Food is not the only limiting factor that keeps populations from growing too large. This statement is false.

Populations are regulated by a variety of factors, including but not limited to food availability. These factors can be categorized into two main types: density-dependent and density-independent factors.

Density-dependent factors are influenced by population size and include factors such as competition for resources (including food), predation, disease, and territoriality.

As a population grows, competition for limited resources, including food, increases. This can lead to reduced growth, increased mortality, and ultimately limit the population's size.

Thus, while food availability is an important factor in population dynamics, it is not the sole limiting factor. Other ecological factors and interactions within the ecosystem play significant roles in regulating population size and preventing populations from growing too large.

Know more about limiting factors:

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Answer: Not determine their exact position.

Explanation:  In the electron cloud model, electrons are said to be moving so fast that a person cannot determine their exact position.

This phenomenon goes well off with the Heisnberg Uncertainity Principle (HUP)which states that the momentum (Δm) and position (Δx) of an obejct cannot be determined simultaneously at the same time.

The mathematical relation of HUP is -

                                      Δx Δm ≥ h/ 4π

where h = Planck's Constant

B. Al +HCI AICI3 +H2. I hope this helps