Araysrussias89
Araysrussias89
04-11-2022
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The nucleus of one boron atom has five protons and four neutrons. Determine the total number of electrons in the boron atom.
solve for t. s=1/2gt^2
Which two compounds have the same molecular formula but different chemical and physical properties? (1) CH3CH2Cl and CH3CH2Br (2) CH3CHCH2 and CH3CH2CH3 (3) CH3
Which element is a brittle solid with low conductivity at STP? (1) sulfur (3) argon (2) sodium (4) aluminum
Given the equation: C2H6 + Cl2 --> C2H5Cl + HCl This reaction is best described as (1) addition involving a saturated hydrocarbon (2) addition involving an u
A matchbox is 5cm by 8cm by 2cm. A carton is 20 cm by 40 cm by 20 cm The carton is completely filled with matchboxes. Work out the number of matchboxes in the
If x is an integer in the first quadrant and sinx=2/5 find each value Cos2x Sinx/2 Tan x/2
The elements of the Periodic Table are arranged on order of increasing(1) atomic number (2) mass number (3) number of isotopes (4) number of moles
Which phrase describes an atom? (1) a positively charged electron cloud surrounding a positively charged nucleus (2) a positively charged electron cloud surroun
When a voltaic cell operates, ions move through the(1) anode (2) cathode (3) salt bridge (4) external circuit
