Questions and Answers
Which of the following is true of all the elements in group 2 on the periodic table? (Select all that apply)
Which of the following statements about the elements in group 2 of the periodic table is true?
They all have two electrons in their outermost shell, they all have similar chemical and physical properties, they all tend to become positive ions when they bond with other elements, they are all metals.
Which statement describes why elements are classified into the groups, such as metals, nonmetals, and metalloids?
The elements in each group have similar properties.
Determine the identity of the following element: This element has 4 valence electrons, shows properties of metals and nonmetals, and has 14 protons in the nucleus of each atom.
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How are elements arranged on the periodic table?
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Which of Brandon's notes about the properties of metals, nonmetals, and metalloids are correct?
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In which group of the periodic table is a soft metallic solid, which is highly reactive and has a low melting point, most likely to be found?
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The elements in the periodic table that have a completely filled outer subshell are known as?
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What is the main difference between a sulfur ion and a chlorine ion?
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What is the atomic number of the element aluminum?
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Based on the periodic table, which of the following elements would be expected to be the least reactive?
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What is the average atomic mass of the element listed in the diagram?
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Which element is the scientist most likely studying if it has a low melting point, a low boiling point, exists as a diatomic molecule in the gas phase, has seven valence electrons, and readily reacts with metals?
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Based on its position in the periodic table, which of the following elements would be expected to be more reactive than phosphorus (P)?
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Which of the following elements is a representative element?
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What do all the elements in group 2 of the periodic table have in common?
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The periodic table consists of elements following a repeating pattern of?
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If an element is located in the middle of the periodic table, into what category would it most likely fit?
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Why is helium placed in group 18 on the periodic table?
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Which of the following groups contains members with similar chemical reactivity?
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Most main group elements found within the same family on the periodic table tend to have?
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Metals tend to appear on the _______ side of the periodic table with the exception of _______ which is a nonmetal.
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Which element has a low melting point, a low boiling point, exists as a diatomic molecule in the gas phase, has seven valence electrons, and readily reacts with metals?
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Elements on the left side of the periodic table tend to bond with elements on the right side.
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Into which of the following groups should antimony be placed?
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What is the chemical symbol for the element carbon?
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The number written to the left of each period on the periodic table represents?
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Which of the following elements is radioactive and synthetic?
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How many valence electrons does a neutral atom of oxygen have?
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Which element is the most reactive out of the list below?
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As atomic numbers increase among halogens, which of the following statements are true? (Select all that apply)
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What predominant feature characterizes noble gases?
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Which family of elements contains a full outer shell of electrons?
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What is most likely a reason why the element hydrogen is placed in group 1 of the periodic table?
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Which of the following properties is true for any period within the periodic table?
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What is the atomic number of the element sulfur?
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Study Notes
Group 2 Elements
- All elements in group 2 are metals with two electrons in the outermost shell.
- Elements in this group tend to lose two electrons and form positive ions.
- They share similar chemical and physical properties.
Classification of Elements
- Elements are organized into groups based on similar properties such as metals, nonmetals, and metalloids.
Atomic Structure
- Silicon is identified as having 4 valence electrons, is metallic and nonmetallic, with 14 protons.
Periodic Table Arrangement
- Elements are arranged by atomic number, indicating the number of protons.
Properties of Metals and Nonmetals
- Metals are efficient at conducting heat and electricity, while nonmetals perform poorly.
- Nonmetals are usually dull and can be shaped easily compared to metals which are often shiny and dense.
- High density is common in metals whereas nonmetals generally have low density.
Element Reactivity
- Group 1 elements comprise highly reactive soft metals with low melting points.
- Elements tend to be least reactive based on their position; iodine is less reactive than other halogens.
Average Atomic Mass
- The average atomic mass of an element can be derived from its isotopes; for example, one element has an average atomic mass of 9.012.
Element Characteristics
- Magnesium shows density, high melting and boiling points, and moderate reactivity, aligning with group 2 properties.
- Reactive elements are often placed based on their valence electron configuration, like sulfur being more reactive than phosphorus.
Noble Gases
- Noble gases in group 18 have completely filled outer shells, leading to low reactivity.
- Elements in the same family or group possess the same number of valence electrons, impacting their chemical reactivity.
Metals and Nonmetals Placement
- Metals predominantly appear on the left side of the periodic table, with hydrogen as a notable exception.
- Group 17 consists of halogens, known for high reactivity; their atomic sizes and properties change with increasing atomic number.
Chemical Symbols and Structure
- Chemical symbols represent elements succinctly; for carbon, this symbol is C.
- The number on the left of each period corresponds to the number of electron shells.
Isotopes and Radioactivity
- Elements like plutonium are noted for being radioactive and synthetic.
Valence Electrons
- Oxygen has 6 valence electrons, which significantly influence its chemical behavior.
Halogens and Noble Gases
- Halogens are the most reactive nonmetals, with trends in atomic size and reactivity observed across the group.
- Noble gases possess a complete outer shell, making them largely inert.
Hydrogen's Placement
- Hydrogen is categorized in group 1 due to having one electron in its outer shell.
Period Characteristics
- Across a period in the periodic table, the number of electrons increases sequentially from left to right.
Atomic Numbers
- The atomic number for sulfur is 16, reflecting its proton count.
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Description
Test your knowledge about the elements in group 2 of the periodic table. This quiz covers their properties, behaviors, and similarities as metals. Perfect for students and chemistry enthusiasts alike!
