Top answers

Chemistry
GCSE

Chlorine is in group 7. What is the charge on its ions, and is the charge positive or negative?

Chlorine is in Group 7 of the periodic table. Therefore a chlorine atom has 7 electrons in its outer shell. this atom needs one more electron to form an ion with a full outer shell. Hence the ion formed w...

Answered by Tom B. Chemistry tutor
86154 Views

What is condensation polymerisation ?

Polymerisation is defined as the process of bringing individual molecules, called monomers, together to form chains of these molecules called polymers. When this process is done with molecules containing ...

Answered by Kishen P. Chemistry tutor
2969 Views

Calculate the relative molecular mass of CaCO3. (relative atomic mass (Ar): C= 12, Ca= 40, O= 16)

Number of atoms
Ca x1 => 40x 1= 40
C x 1 => 12x1 = 12
O x 3= 16 x 3= 48CaCO3
RMM= 40 + 12 + 48= 100

Answered by Roxanne M. Chemistry tutor
23287 Views

What is a covalent bond?

A covalent bond in an intramolecular bond which occurs when a pair of electrons is shared between two elements, usually two non-metals. The electrons shared are in the outer shell of the atom of each elem...

Answered by Rebecca P. Chemistry tutor
3228 Views

Use the structure of sodium chloride to explain why it has a high melting point. (2 marks)

There are strong electrostatic forces of attraction between oppositely charged ions within sodium chlorides giant lattice. The strong electrostatic forces must be broken in order ...

Answered by Evie C. Chemistry tutor
6624 Views

We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences