Question 24 Which statement below is not correct? 1. Calcium is an alkaline earth metal. 2. Silicon is a metalloid. 3. Fluorine is a nobel gas 4. Sodium an alkali earth metal O 1 3 2)

Q: Based on the Activity Series of the metal elements, which element in the following pair will be more…

A: In the activity series of non-metals, elements higher on the list are more reactive and more likely…

Q: . What is the 3rd most prevalent element in the human body (name, not symbol)?

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Q: The number of valence electrons found in an atom of a Group A element is equal to     eight.…

A: The number of valence electrons found in an atom of a Group A element is equal to

Q: 1.Who created the first periodic table? 2. How did this Russian scientist first arranged the…

A: [1.] Dmitri Mendeleev  [2.] Petersburg( Russia), Russian chemist who developed the periodic…

Q: Part A What is an ion? An ion is a charged particle. O An ion is a neutral particle.

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Q: Decide which element probably forms a compound with oxygen that has a chemical formula most and…

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Q: 35. What is the total number of electrons in a phosphorus ion?

A: The phosphorous atom symbol is P which has the atomic number 15.

Q: Based on your understanding of the relationships between the structures and physical properties of…

A: Metals have high melting point.Generally metals are hard except Li, Na and K.Metals are generally…

Q: What is the relative abundance of each element in out atmosphere? Oxygen [Select] Nitrogen [Select]…

A: The atmosphere is composed of nitrogen, oxygen, argon, carbon dioxide, and other gases. Nitrogen,…

Q: Question 29 What ionic charge would you think most likely for the element Se? (You may want to refer…

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Q: QUESTION 9 Consider the following generic picture of an atom. 2 Which of the following is correct…

A: The objective of the question is to choose the correct description of the regions labeled 1 and 2.

Q: How many core electrons does nickel contain? O 26 O 18 O 2

A: How many core electron in Nickel ?

Q: 3. Provide an example (chemical symbol) for each of the following: A) s-block element B) p-block…

A: There are four blocks in the modern periodic table as per according to the various properties of…

Q: st Laboratory Questions: 1. Compare and contrast an ion from an isotope.

A: Ions and isotopes are two important concepts in chemistry that are related to the structure and…

Q: For each of the following atomic numbers, use the periodic table to write the formula (including the…

A: The element mostly liked form is based on the concept of the octet rule so that the electrons gained…

Q: 1. There are three naturally occurring isotopes of silicon: Si-28, Si-29 and Si-30. If Si-28 makes…

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Q: Question 49 Which of the following groups of elements contains a metal, a metalloid and a noble gas?…

A: Metalloids usually have a metallic appearance. However, these substances frequently act in a…