During the latter part of your European vacation, you are hanging out at the beach at the gold coast of Spain. As you are laying

The elements that belong to group 2 are known as alkaline earth metals, and the primary resemblance among them revolves around their chemical characteristics.

Additional Details

Periodic Table 

• The periodic table organizes elements in vertical columns referred to as groups and horizontal rows known as periods.
• Elements are positioned according to their physical and chemical traits, ensuring that those in the same group exhibit comparable physical and chemical properties. 

Chemical Families 

• Elements that share similar chemical or physical traits are categorized into families based on their chemical behavior.
• Common examples of chemical families include alkali metals, alkaline-earth metals, halogens, and noble gases among others.

Alkaline-earth Metals 

• These elements are located in group 2 of the periodic table and consist of Beryllium, Magnesium, Calcium, Strontium, Barium, and Radium. 

Characteristics of Alkaline-earth Metals

• Alkaline earth metals possess a valence of two as they create ions by shedding two electrons from their outermost energy levels.
• Unlike alkali metals, alkaline-earth metals have smaller atomic sizes and are less reactive.
• They are notably metallic and have excellent electrical conductivity.
• These metals react with water and steam to yield metal hydroxides and metal oxides, respectively.
• When exposed to air, they form metal oxides.
• The reactivity of alkaline earth metals is linked to the ease of electron loss, which increases as one moves down the group due to the increasing number of energy levels.
• Additionally, they exhibit low electronegativity values and low electron affinities. 

Keywords: Chemical families, alkaline-earth metals, reactivity 

Discover more about:  

• Chemical families:
• Alkaline-earth metals:
• Properties of alkaline-earth metals:
• Reactivity of metals:

Level: High school 

Subject: Chemistry 

Topic: Periodic table and chemical families 

Sub-topic: Alkaline-earth metals 

Response:

Key Highlights

Ionic bonds arise from the exchange of electrons between a nonmetal and a metal, while covalent bonds are formed through the sharing of electrons between two nonmetals. An ionic bond consists of a chemical bond established by the electrostatic attraction between two ions with opposite charges.

Details:

The previously accepted theory that was proven incorrect is the Geocentric Theory, which placed Earth at the center of the universe. This idea was introduced by philosopher Ptolemy. He formulated this hypothesis based on his observations that celestial bodies such as the Sun, stars, and the moon appeared to move around Earth from our vantage point. However, Galileo Galilei contradicted this notion with his Heliocentric Theory. He used a telescope to observe that Venus undergoes phases, akin to the moon, leading him to conclude that the alignment of Venus, Earth, Moon, and Sun did not support the earlier theory. 

Answer:

The amount of heat that enters the gas throughout this two-step process totals 120 cal.

Explanation:

Given that,

Moles present = 3

Heat capacity at volume held constant = 4.9 cal/mol.K

Heat capacity at pressure held constant = 6.9 cal/mol.K

Starting temperature = 300 K

Ending temperature = 320 K

We are tasked with determining the heat absorbed by the gas at constant pressure

Employing the heat formula

Substituting the values into the equation

Next, we calculate the heat absorbed by the gas at constant volume

Using the corresponding heat formula

Insert the values into the formula

Now, it's necessary to evaluate the total heat flow into the gas during both steps

Using the total heat formula

Thus, the heat that transfers into the gas throughout this two-step process amounts to 120 cal.