Complete the sentence. Elements are made up of one type of a
nitrogen
carbon
Nickel
Bromine
Copper
iodine
phosphorus
cobalt
chlorine
mercury
Boron
Fluorine
Calcium
Chromium
Iron
Complete the sentence. In question 2, two elements do not have the same first letter as their symbols. These two elements are ________ and ___________.
Complete the sentence. A new material has been made by scientists in which all of the atoms are the same. This material is a new e