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In terms of electrons, what happens when a calcium atom reacts with chlorine atoms to form calcium chloride?

Calcium chloride in an ionic compound. The calcium atom loses two electrons, and each chlorine atom gains one electron, to form a full outer shell of electrons. The electrostatic force of attraction betwe...

Answered by Yusuf S. • Chemistry tutor

33529 Views

Describe what is meant by the following musical textures: 1) homophonic, 2) polyphonic, 3) call and response.

Homophonic texture is when the music sounds 'as one', such as block chords, where all instruments change notes at the same time.
Polyphonic means 'many sounds'. The instruments...

Answered by Tom F. • Music tutor

18058 Views

Factorise the following expression: 2(x^4) + 4(x^2) - 32(x^3)

2x²(x² + 2 - 16x)

Answered by Tom F. • Maths tutor

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Can two shelves of 0.72 meters long each store 50 30mm wide textbooks?

First, convert the units so you can compare more easily.

0.72m = 72cm = 720mm

So 1 shelf is 720mm and 1 textbook is 30mm wide.

To find the maximum number of books that can be stored...

Answered by Valerie L. • Maths tutor

3475 Views

What is a Sankey diagram and how do we use it?

A Sankey Diagram can be used to represent the energy usage and efficiency of anything. There are 3 main parts of Sankey diagram, the start (left side), the arrow heads that peel off facing upwards or dow...

Answered by Alex W. • Physics tutor

10509 Views