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Why is the first ionisation energy lower in barium compared to calcium?

Barium has more electrons shells than calcium, so the nuclear shielding is stronger, and the outmost electrons are further away from the nucleus. This results in a weaker attractive force between the electro...
JF
Answered by Joseph F. • Chemistry tutor
17337 Views

Choose a title for each paragraph. Write the correct letter in each box.

I would ask the tutee for the past paper that they were struggling with and talk through the reading passage with them, identifying key words to help answer the questions. French is more ambiguous with the a...
LD
Answered by Libby D. • French tutor
6147 Views

Escribe un e-mail a tu mejor amigo/a sobre los primeros dias en el colegio nuevo.

Te acabas de mudar a otra ciudad durante el verano. Describe como pare el colegio. Describe tu clase y la gente que has conocido por el momento. Escribe que es lo que mas te gusta del nuevo sitio. Describe l...
IR
Answered by Ines R. • Spanish tutor
2846 Views

Describe the texture of bars 3-6

The answer to this question will depend on the piece of music to which it applies, however there are several different textures which you must know for GCSE music: Unison - this is where all singers or instr...
LD
Answered by Libby D. • Music tutor
4742 Views

Me llamo Ana, tengo 15 años. Tengo 3 hermanos pequeños, uno con 3 años menos que yo, otro con 5 años menos que yo y el ultimo de 6 años. Es muy dificil ser la mayor. Mis padres me mandan ayudarles en todo, hacer la cena, planchar y poner la lavadora.

Cuantos años tiene Ana? Cuantos años tienen sus hermanos? Que le mandan hacer sus padres a Ana? (longer text, more questions)
IR
Answered by Ines R. • Spanish tutor
2947 Views