When metals are bonded with non-metals, what type of bond is formed?
ionic bond
Give 3 reasons why Francium is the most reactive element?
bigger size more shells, weaker electrostatic force, easy to donate valence electron
What is used in bioleaching?
bacteria
It is the positive ion.
Cation
It is the 7th group of elements.
Halogens
What bond is in the molecule of water?
covalent bonds
Give two reasons why Kr is unreactive.
it has full outermost shell. It is already stable, does not need to react.
How many shells does Sodium (Na) has?
3
The process by which gas changes into solid.
deposition
What are valence electrons?
electrons at the outermost shell.
These compounds do not conduct electricity at solid state but can conduct electricity aqueous state.
Ionic compounds
The process by which particles move from an area of higher concentration to an area of lower cconcentration.
diffusion
What does metallic bond have that other type of bonds doesn't have?
delocalized electrons
What metal ion produces lilac color flame?
Potassium (K)
Who proposed the "Plum Pudding Theory" of atom?
Joseph John (J.J.) Thomson
What is used in phytomining?
Plants
How are metals extracted through displacement method?
More reactive metals replace a less reactive one.
What is the electron configuration of Calcium (Ca)?
2,8,8,2
It has similar number of protons and electrons but different atomic mass.
Isotopes
How do enzyme work in a chemical reaction?
It acts as a catalyst. Using less energy while producing similar amount of products at a shorter periodof time.
Which is the most reactive non-mental element.
Fluorine