Chemistry

Which of the following describes valence electrons?

• Numbers of electrons lose

• Numbers of electrons gained

• Electrons in the inner most energy level

• Electrons in the outer most energy level

What do you call the structure of atom and molecules who's valence electrons are represented by a dot?

• Alvence

• Bronstead

• Lewis dot

• Lori

Which of the elements can combined to form ionic?

• NaCl

• HN

• SmSr

• XeL

Which elements reseas Bond Formation with other elements?

• Argon

• Bromin

• Gold

• Silver

Many organic solvents boil below 200 ⁰C because of covalent Bond, solid such as copper do not melt until thousands ⁰C, Why because the atoms form?

• It forms hydrogen bond

• It forms metallic bond

• Non-polar bond

• Polar bond

The ions Lithium, Beryllium and Helium do not follow the octep rule, why?

• They belong to group 1A

• They are stable with 3 and 4 ē

• They are stable with 2 ē only

• They do not have a 8 ē

Which of the following is covalent compound?

• AF

• CS2

• CO2

• CCl4

Which of the following is covalent compound

• BaO

• CCl4

• Li2O

• KBr

Which of the following is not a characteristics of metal?

• Maliable and Ductil

• Good conductors of Hit

• Good conductors of electricity

• Low melting and boiling point

A positive ion is known as what?

• An-ion

• Cat-ion

• Proton

• Electron