Answer:
They are arranged by in order by the increasing atomic number.
Explanation:
The horizontal rows are called periods and the vertical columns are called groups.Elements in the same group have similar chemical properties.This is because they have the same number of our electron and the same valency.
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Answer:
12
Explanation:
Jesus' 12 disciples conformed the basis for his church, and many of them have even written sections of the bible. Revelation 21:14 indicates that the 12 foundations of New Jerusalem's wall are going to contain in them the names of the 12 disciples. So, these 12 men are of great importance to God. The names of the 12 apostles are Simon Peter, Andrew, James (Zebedee's son), John, Philip, Bartholomew, Thomas, Matthew, James (Alphaeus' son), Thaddaeus, Simon the Zealot and Judas Iscariot.
A railway air brake is a railway brake power braking system with compressed air as the operating medium.new trains use a fail-safe air brake system that is based on a design patented by George Westinghouse on March 5, 1868.
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