Period 4 element be dangerous in large enough quantities due to its radioactivity. Nickel (Ni) is an element in period 4, between cobalt and copper. Nickel is rare in the Earth's crust, mainly due to the fact that it reacts with oxygen in the air, with most of the nickel on Earth coming from nickel iron meteorites. However, nickel is incredibly common in the Earth's core; along with iron it is one of the two main components. Nickel is an important component of stainless steel, and in many superalloys. Copper (Cu) is an element in period 4, between nickel and zinc. Copper is
CU London CU London CU London is a Higher Education institute owned and governed by Coventry University. CU London began offering courses to students in September 2017 and currently operates in the Dagenham Civic Centre in the London Borough of Barking and Dagenham. It is Coventry University's second campus in the capital alongside Coventry University London. CU London offers a range of subjects across Foundation, HNC, HND and degree level, which students can study full-time or part-time on evenings or weekends. Subjects offered by CU London include: Beyond its work teaching on undergraduate courses, CU London has continued to use its campus,