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Sand, which is used in making glass, is formed mainly of the compound silica (a compound formed between silicon Si and oxygen O). Silicon is used also in computer chips. When mixed with steel, it makes the alloys harder and resistant to corrosion while oxygen is used in chemical industry and medical treatment. The documents below show some information about silicon and oxygen atoms. nb of protons nb of neutrons Nuclear charge Silicon atom 14 15 Oxygen atom 8+ Document 1 Document 2 1-Referring to document 1: 1.1- Indicate the number of electrons of silicon atom. 1.2- Determine the atomic number of silicon atom. 1.3- Calculate its mass number. 1.4- Write the atomic representation of silicon atom (Si).

Sand, which is used in making glass, is formed mainly of the compound silica (a compound formed between silicon Si and oxygen O). Silicon is used also in computer chips. When mixed with steel, it makes the alloys harder and resistant to corrosion while oxygen is used in chemical industry and medical treatment. The documents below show some information about silicon and oxygen atoms. nb of protons nb of neutrons Nuclear charge Silicon atom 14 15 Oxygen atom 8+ Document 1 Document 2 1-Referring to document 1: 1.1- Indicate the number of electrons of silicon atom. 1.2- Determine the atomic number of silicon atom. 1.3- Calculate its mass number. 1.4- Write the atomic representation of silicon atom (Si).

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Exercise -1- (6pts) Chemical Composition of Sand Sand, which is used in making glass, is formed mainly of the compound silica (a compound formed between silicon Si and oxygen O). Silicon is used also in computer chips. When mixed with steel, it makes the alloys harder and resistant to corrosion while oxygen is used in chemical industry and medical treatment. The documents below show some information about silicon and oxygen atoms. nb of protons nb of neutrons Nuclear charge Silicon atom 14 15 Oxygen atom 8+ Document 1 Document 2 1-Referring to document 1: 1.1- Indicate the number of electrons of silicon atom. 1.2- Determine the atomic number of silicon atom. 1.3- Calculate its mass number. 1.4- Write the atomic representation of silicon atom (Si). 2-Referring to document 2: .1- Show that atom number Z of oxygen atom is 8. 2.2- Write its electronic configuration . 2.3- Identify its valence shell and valence electrons. 2.4- Write its Lewis dot symbol and deduce its valency. 3- Referring to the text: 3.1- Give one use of silicon and one use of oxygen.
Transcribed Image Text:Exercise -1- (6pts) Chemical Composition of Sand Sand, which is used in making glass, is formed mainly of the compound silica (a compound formed between silicon Si and oxygen O). Silicon is used also in computer chips. When mixed with steel, it makes the alloys harder and resistant to corrosion while oxygen is used in chemical industry and medical treatment. The documents below show some information about silicon and oxygen atoms. nb of protons nb of neutrons Nuclear charge Silicon atom 14 15 Oxygen atom 8+ Document 1 Document 2 1-Referring to document 1: 1.1- Indicate the number of electrons of silicon atom. 1.2- Determine the atomic number of silicon atom. 1.3- Calculate its mass number. 1.4- Write the atomic representation of silicon atom (Si). 2-Referring to document 2: .1- Show that atom number Z of oxygen atom is 8. 2.2- Write its electronic configuration . 2.3- Identify its valence shell and valence electrons. 2.4- Write its Lewis dot symbol and deduce its valency. 3- Referring to the text: 3.1- Give one use of silicon and one use of oxygen.
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