Interpretation:
The three indicated red element and their group should be determined. Whether these elements are catrgorized as metals, nonmetal or semimetals should be determined. Also, whether these elements should be expected to have similar or different properties should be determined.
Concept introduction:
Periodic table represents a systematic arrangement of elements according to their chemical and physical properties. Here, elements are represented as a two-letter symbol and are arranged in increasing order of
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CHEMISTRY-TEXT
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- 1. Describe briefly, indicating the scientist responsible, experiments that gave the following evida,riee7RT¬the model of an atom:a) The atom consists of a very tiny, thickly dense positively charged nucleus, surrounded by a negatively charged electron cloud.b) The nucleus contains a specific number of protons, positively charged particles that gives the atomic number.c) Neutrons together with the protons in the nucleus account for the atomic weight.arrow_forwardSilicon is the foundation of today's Microelectronics.a) Indicate which other elements from group IV of the periodic table find applications in electronics, pointing out their usefulness.b) Similarly, composite materials using elements from groups III-V are widely used. Name at least 3 of these compounds, exemplifying their respective applications.arrow_forwardIdentify the three elements indicated on the periodic table, and give the group that they are in. Classify these elements as metals, nonmetals, or semimetals. Would you expect these elements to have similar or different chemical reactivity?arrow_forward
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