Chemistry, 11.07.2019 19:00 winterblanco
An element x has two isotopes. xβ15 has 7 protons and 8 neutrons. determine the atomic number and mass number of the second isotope, which has 10 neutrons in its nucleus. a. atomic number = 8; mass number = 9 b. atomic number = 8; mass number = 17 c. atomic number = 7; mass number = 17 d. atomic number = 7; mass number = 15
Answers: 1
Chemistry, 22.06.2019 10:00
Main expenses you plan on making payments on a new car too. you want to spend 15% of your monthly net pay on the car payment, insurance, registration, and taxes combined. what is your monthly car allowance? $149.46 $298.91 $448.37 $597.83
Answers: 3
Chemistry, 22.06.2019 12:00
Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.
Answers: 3
Chemistry, 22.06.2019 16:00
He table below gives the atomic mass and relative abundance values for the three isotopes of element m. relative abundance (%) atomic mass (amu) 78.99 23.9850 10.00 24.9858 11.01 25.9826 what is the average atomic mass (in amu) of element m? 2.86 5.36 24.30 24.98
Answers: 2
Chemistry, 22.06.2019 17:00
The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?
Answers: 1
An element x has two isotopes. xβ15 has 7 protons and 8 neutrons. determine the atomic number and ma...
Physics, 12.07.2019 08:30
Social Studies, 12.07.2019 08:30
Mathematics, 12.07.2019 08:30
Mathematics, 12.07.2019 08:30
Mathematics, 12.07.2019 08:30
Social Studies, 12.07.2019 08:30
Geography, 12.07.2019 08:30
Computers and Technology, 12.07.2019 08:30
Social Studies, 12.07.2019 08:30
Biology, 12.07.2019 08:30