Multiple Choice
The elements sodium,magnesium,and silicon ________.
A) are isotopes of each other
B) are in the same period of elements
C) have the same number of neutrons
D) are in the same group
E) have the same mass number
Correct Answer:
Verified
Correct Answer:
Verified
Q19: What element has the electron arrangement 2,8,4?<br>A)carbon<br>B)oxygen<br>C)sulfur<br>D)iron<br>E)silicon
Q20: The number of electrons in the outer
Q21: A copper atom with 30 neutrons has
Q22: Write the electron arrangement for the atom
Q23: The mass number is equal to the
Q25: Pb is the symbol for _.<br>A)lead<br>B)silver<br>C)plumbium<br>D)potassium<br>E)mercury
Q26: What is the symbol of the element
Q27: Write the electron arrangement for the atom
Q28: The symbol for sodium is So.
Q29: The atomic size of atoms _.<br>A)increases going