Read each description in the first column of the table below. If any chemical element with atomic number of 92 or less matches the description, check Yes and enter the chemical symbol of an element that matches. Otherwise check No in the second column. Does any element with ZS 92 match the description? If you checked yes, give the symbol of an element with zS 92 that matches. description An element in Period 6 and Group 3A. O Yes O No A metalloid in Group 5A. O Yes O No A halogen with a higher atomic number than beryllium. O Yes O No A transition element in Period 5. O Yes O No

Kead each description in the first column of the table below. If any chemical element with atomic number of 92 or less matches the description, check Yes and enter the chemical symbol of an element that matches. Otherwise check No in the second column. description Does any element with Z ≤ 92 match the description? If you checked yes, give the symbol of an element with Z ≤ 92 that matches. An element in Period 3 and Group 5A. Yes No A nonmetal in Group 6A. Yes No An alkaline earth metal with a higher atomic number than silicon. O Yes O No A main-group element in Period 4. O Yes No O ☐

1- For each of the following atoms, calculate the number of protons and neutrons in the nucleus and the number of electrons outside the nucleus (assume neutral atoms). element number of number of number of electrons mass number (A) symbol 126C protons (Z) neutrons 12 10 12 10 14 27 10 23,1Na 11 17 18 2- Calculate the atomic mass to four significant figures for carbon, given the following data: Isotope Exact Atomic Mass (amu) 12.00000 13.00335 Abundance in Nature (%) 98.89 1.110 12C 13C

Read each description in the first column of the table below. If any chemical element with atomic number of 92 or less matches the description, check Yes and enter the chemical symbol of an element that matches. Otherwise check No in the second column. 1 description An element in Period 2 and Group 2A. A metalloid in Group 4A. A halogen with a lower atomic number than gallium. A transition element in Period 3. Explanation F1 Check # 20 F3 Does any element with Z≤ 92 match the description? Yes OYes OYes O Yes $ O No O No F4 O No O No If you checked yes, give the symbol of an element with Z ≤ 92 that matches. % X F5 0 0 0 MacBook Air ^ G 6 SA F6 & 7 Ⓒ2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility F7 DII F8 F9

Identify these elements based on their locations in the periodic table. Give the symbol, not the name.

A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar System. Mass-spectroscopic analysis produced the following data on the Isotopes of ruthenium in these samples: mass relative isotope (amu) abundance 100 Ru 99.90 58.% 96 Ru 95.91 42.% Use these measurements to complete the entry for ruthenium in the Periodic Table that would be used on 98765 ALEKS. Round your entry for the atomic mass to 2 significant digits. Caution: your correct answer will have the same format but not necessarily the same numbers as the entry for ruthenium in the Periodic Table we use here on Earth. Ru Submit Assignment Continue 2021 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center Accessibility DII -> esc & 23 $4 @ 4 3 r

The atomic number indicates_ the total number of neutrons and protons in a nucleus the number of different isotopes of an element the number of neutrons in a nucleus O the number of atoms in 1 g of an element the number of protons or electrons in a neutral atom

Read each description in the first column of the table below. If any chemical element with atomic number of 92 or less matches the description, check Yes and enter the chemical symbol of an element that matches. Otherwise check No in the second column. description Does any element with Z ≤ 92 match the description? If you checked yes, give the symbol of an element with Z ≤ 92 that matches. An element in Period 4 and Group 1A. Yes No A semimetal in Group 8A. Yes No ☐ An element in the nitrogen family with a higher atomic number than boron. Yes No ☐ A main-group element in Period 4. Yes No ☐ ☑

QUESTION Read each description in the first column of the table below. If any chemical element with atomic number of 92 or less matches the description, check Yes and enter the chemical symbol of an element that matches. Otherwise check No in the second column. Does any element with zS 92 match the description? If you checked yes, give the symbol of an element with z S 92 that matches. description An element in Period 4 and Group 5A. O Yes O No Yes No A semimetal in Group 8A. An element in the nitrogen family with a higher atomic number than indium. Yes No Yes No A main-group element in Period 2. More Practice O 2021 McGraw-Hill Education. All Rights Reserved. Terms of Use Privacy Accessibili acer a sieon ed backspace delete %23 $ 3 4 5 6. 8 t e