Question

based on the information in the table, which elements are most likely in the same periods of the periodic table? facts about five elements element atomic mass (amu) total electrons valence electrons year isolated aluminum (al) 27 13 3 1825 boron (b) 11 5 3 1808 carbon (c) 12 6 4 1803 gallium (ga) 70 31 3 1875 germanium (ge) 73 32 4 1886 boron and carbon are likely together in one period because they have very close atomic masses, while gallium and germanium are likely together in another period because they have very close atomic masses. aluminum, boron, and carbon are likely together in one period because they were first isolated in the first half of the 1800s, while gallium and germanium are likely together in another period because they were first isolated in the second half. boron and carbon are likely together in one period because they each end in “-on,” while aluminum, gallium, and germanium are likely together in another period because they each end in “-ium.” aluminum, boron, and gallium are likely together in one group because they have the same number of valence electrons, and carbon and germanium are likely together in another group because they have the same number of

Explanation:

Step1: Recall periodic - table concept

Elements in the same period have the same number of electron - shells. Atomic number (equal to total number of electrons) determines the position of an element in the periodic table.

Step2: Analyze options

• Option 1: Atomic mass is not the determining factor for elements to be in the same period.
• Option 2: The year of isolation has no relation to the position of elements in the periodic table.
• Option 3: The naming convention has no relation to the position of elements in the periodic table.
• Option 4: Elements with the same number of valence electrons are likely to be in the same group. Aluminum (Al), boron (B), and gallium (Ga) have 3 valence electrons and carbon (C) and germanium (Ge) have 4 valence electrons. This option correctly groups elements based on valence - electron number which is related to their position in the periodic table.

Answer:

Aluminum, boron, and gallium are likely together in one group because they have the same number of valence electrons, and carbon and germanium are likely together in another group because they have the same number of valence electrons.