Which has a higher ionization energy: chlorine (Cl) or magnesium (Mg)? Why? Select the best answer.(1 point) Responses Mg; it takes more energy to pull two electrons away from magnesium(Mg) than it does to take them from chlorine(Cl). Mg; it takes more energy to pull two electrons away from magnesium(Mg) than it does to take them from chlorine(Cl). Cl; it takes much more energy to pull an electron away from a valence shell that is nearly full. Cl; it takes much more energy to pull an electron away from a valence shell that is nearly full. Cl; it takes less energy to add an electron to a valence shell that is nearly full. Cl; it takes less energy to add an electron to a valence shell that is nearly full. Mg; magnesium has more valence electrons than chlorine.
The correct answer is: Cl; it takes much more energy to pull an electron away from a valence shell that is nearly full.
How did Mendeleev come up with the first periodic table of the elements?(1 point) Responses He arranged the elements by different properties to find a pattern. He arranged the elements by different properties to find a pattern. He organized the elements by their atomic number. He organized the elements by their atomic number. He estimated the number of electrons in atoms of each element. He estimated the number of electrons in atoms of each element. He determined the mass of atoms of each element.
The correct answer is: He arranged the elements by different properties to find a pattern.
How does the Coulomb force affect charge interactions?(1 point) Responses Like charges repel, and opposite charges attract. Like charges repel, and opposite charges attract. Like and opposite charges repel. Like and opposite charges repel. Like and opposite charges attract. Like and opposite charges attract. Like charges attract, and opposite charges repel.
The correct answer is: Like charges repel, and opposite charges attract.
Which statement describes the properties of lanthanoids and actinoids?(1 point) Responses They are brittle and dull, and they tend to be poor conductors of both electricity and thermal energy. They are brittle and dull, and they tend to be poor conductors of both electricity and thermal energy. They are brittle and dull, and they tend to conduct both electricity and thermal energy. They are brittle and dull, and they tend to conduct both electricity and thermal energy. They are malleable and lustrous, and they tend to conduct both electricity and thermal energy. They are malleable and lustrous, and they tend to conduct both electricity and thermal energy. They are malleable and lustrous, and they tend to be poor conductors of both electricity and thermal energy.
The correct answer is: They are malleable and lustrous, and they tend to conduct both electricity and thermal energy.
Two representative elements are in the same period of the periodic table. Which statement correctly describes the atoms of the two elements?(1 point) Responses They have the same number of electrons. They have the same number of electrons. They have the same number of valence electrons. They have the same number of valence electrons. They have valence electrons in the same energy level. They have valence electrons in the same energy level. They have valence electrons in different energy levels
The correct answer is: They have valence electrons in the same energy level.
