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Describe and explain the reactivity of group 1 metals

The reactivity of Group 1 metals increases as we move down the periodic table.As we move down the group 1 elements the number of electron shells increases. This means that the electrostat...

Answered by Myles D. • Chemistry tutor

2307 Views

Bennett has said that the boys in the play know more than any of their teachers. How far do you agree that the boys “know more” than the staff?

When first reading Bennett’s ‘The History Boys’ one may assume that the boys “know more” than the staff on the basis of their condescending nature and their naturally bright aptitudes, despite their relat...

Answered by Caitlin C. • English Literature tutor

3819 Views

write (3.2 x 10^4) - (5 x 10^3) in standard form

In order to do this question you want to make sure that both parts of the subtraction are multiplied by the same power of 10.In this case let's make the second part in terms of 10^4. So it becomes 0.5 x 1...

Answered by Edward G. • Maths tutor

3641 Views

[Higher] Simplify the following expressions: x^7 X x ^5 and (x^-2)^-3

For the first part, when we are multiplying a number of two different powers (here being 7 and 5), we must add the powers in order to simplify the expression. So here x⁷ * x⁵ = x

Answered by Zak S. • Maths tutor

2743 Views

Write each of the following numbers to 2 decimal places: 65.4632, 9.8971.

When writing numbers to two decimal places, we need to look at the third digit after the decimal place first. If it is 4 or under, then we can just finish the number after the second digit after the decim...

Answered by Zak S. • Maths tutor

2506 Views