Question

Use the periodic table to choose the element that matches each description. halogen: group IIA: nonreactive: alkali metal:

Answer 1

The grouping of elements, mostly based on the relative atomic mass

Further explanation

The periodic system of elements is an arrangement of elements classified based on similar properties and their atomic number order.

The periodic system is divided into groups (vertical order) and periods (horizontal order)

• Halogen:

Halogen is a chemical element in group 7A consisting of fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatin (At)

• group IIA:

This group is also known as alkaline earth metal. The elements in this group are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).

•  nonreactive:

for metals, in one group, the more reactive the more downward

for non-metallic elements, in one group, the more down the less reactive

• alkali metal:

alkali metals belong to group IA

the elements in group 1A: lithium (Li), sodium (Na), potassium (K) rubidium (Rb), cesium (Cs), and francium (Fr)

Learn more

Identify the group number

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region of the periodic table

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Group 1A elements is the least reactive

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Keywords: The periodic system of elements, atomic numbers, groups, periods

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Answer 2

Use the periodic table to choose the element that matches each description: halogen (group 7a), group IIA (harder), nonreactive (lacking a response or reaction to a stimulus nonreactive pupils as a result of head trauma), alkali metal (Group IA)

Explanation:

The periodic table known as the element periodic table is a tabular display of the chemical elements that arranged by atomic number, electron configuration, and recurring chemical properties.

Use the periodic table to choose the element that matches each description: halogen, group IIA, nonreactive, alkali metal!

• Halogen: Halogen, any of the six nonmetallic elements constitutes the Group 17 (Group 7a) of the periodic table. These elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts).
• Group IIA: Group 2A of the periodic table are the alkaline earth metals such as beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). They're harder and less reactive than the alkali metals of Group 1A .
• Nonreactive: Nonreactive is lacking a response or reaction to a stimulus nonreactive pupils as a result of head trauma. For metals in one group, the more reactive the more downward. Wheres for non-metallic elements, in one group, the more down then the less reactive
• Alkali metal: Alkali metals are any of the elements such as lithium, sodium, potassium, rubidium, caesium, and francium that occupying Group IA (1) of the periodic table. They are very reactive, electropositive, monovalent metals forming strongly alkaline hydroxides.

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