SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They are the same size
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They react with each other
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They have similar properties
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They have the same number of protons
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Detailed explanation-1: -They have the same atomic number.
Detailed explanation-2: -The first column on the periodic table of the chemical elements is collectively called the alkali metal group: lithium, sodium, potassium, rubidium, cesium, and francium. Because their outer electron structure is similar, they all have somewhat similar chemical and physical properties.
Detailed explanation-3: -Both metals are in group one of the periodic table, and therefore will react similarly, since they both have one valence electron. However, since the Na atom’s valence electron is further away from the nucleus than Li’s valence electron, Na is more reactive than Li, as it will lose its valence electron more easily.
Detailed explanation-4: -Group 1A (or IA) of the periodic table are the alkali metals: hydrogen (H), lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). These are (except for hydrogen) soft, shiny, low-melting, highly reactive metals, which tarnish when exposed to air.
Detailed explanation-5: -Lithium, sodium and potassium elements were put in one group on the basis of their similar properties.