2. The atomic number of fluorine is 9. How many electrons does ion of fluorine have...
The atomic number of lithium is 3. How many neutrons does an atom of lithium have if it is represented by the symbol shown below? 1. 7Li O A. 2 neutrons O B. 13 neutrons O C.4 neutrons O D.7 neutrons
1. How is 120,700 written in scientific notation? O A. 120.7.10 O 8.12.07.10 O C. 1.207.105 O D. 0.1207.10 2. What number is equivalent to 6.75. 104 O A 0000675 O 30.0675 OC.6,750 0 0.67.500 3. A balance accurate to one hundredth of a gram measures the mass of a rock to be 56.10 grams. How many significant digts are in this var ОАО OB D. Theret enough information to answer this question 4. In the calculation shown below, how...
1- an atom has the following chemical symbol: 114Cd a- how many protons does this atom have? b- how many neutrons does this atom have? c- how many electrons does this atom have? 2- an ion has 33 protons, 41 neutrons, and 36 electrons a- what is the mass number of this atom? b- what is the symbol for this ion? enter both mass and the atomic number 3- which of these ions has the same number of electrons as...
How many electrons does the O -2 ion have in the outer level?
a.8 b.9 c.10 d.20
1. Give the ground-state electron configuration for carbon (atomic number 6) sa 82p 2 Give the ground-state electron configuration for fluorine (atomic number 9). 3. Give the ground-state electron configuration for magnesium (atomie number 12), 4. How many electrons does silicon have in its valence shell? Write valid Lewis (electron-dot) structures for each formula below. Show all electrons as dots and show al non-bonding electrons. 5. CC tetrachloroethylene CO2 carbon dioxide 7. CHO methanol 8. The structure of urea is...
How many d electrons are there in MnO4 ? ground state atomic number of Mn is 25 ground state atomic number of O is 8
1a. An isotope, Sulfur 35 (atomic #16), has _____ neutrons. 1b. How many protons does Cu+3 (atomic # 29) have? 1c. How many electrons does Cu+3 (atomic # 29) have? 1d. How many protons does Br-1 (atomic # 35)? 1e. How many electrons does Br-1 (atomic # 35)? 2a. How many neutrons does an isotope and an ion of carbon, Carbon-2 16 (atomic # 6) have? 2b. How many protons does an isotope and an ion of carbon, Carbon-2 16...
Fluorines atomic number is 9 and its atomic mass is 19. How many neutrons does fluoride have?
1/ What is the atomic mass and atomic number for the following (show how to write it and express it). How many protons, neutrons, and electrons are present in atoms with the following characteristics? a. Fe? ? b. Be? ? c. Au? ? d. Pb? ? 2/ How many valence electrons do atoms with the following electron configurations have and what is the chemical symbol? 1s22s22p63s2 1s22s22p63s23p64s23d104p6 1s22s22p63s23p5 1s22s22p63s23p64s23d10