anti-matter/ matter collision ?

if we take an atom made of anti matter

the nucleus will be negatively charged made of anti proton

and while positrons will be surrounding it ( an electron with a positive charge )

if we bring an atom made of matter and anti matter close ,

the gravitational force will be same as that between atoms of matter

, but the electrostatic force will be much greater ( theu carry opposite charge)

and will annihilate each other .

He grow to be describing some thing going on AFTER the enlargement grow to be already underway and the ability had cooled sufficiently for matter to variety. all of us comprehend that matter can address of power (and vice versa), and Einstein's equation E = m c^2 helps us understand the courting between power and matter (they are both only a diverse manifestation of "some thing" difficulty-loose). In labs, when we do variety matter from power at low degrees of power (compared to what grow to be obtainable on the time), we continuously get an equivalent volume of what we call matter and anti-matter. it is okay because the matter and anti-matter can social gathering and grow to be power once back (the transformation can artwork both strategies). If we keep on with this idea to the early universe, then all the matter that grow to be created (such as what's left at present) ought to were created mutually as an equivalent volume of anti-matter. for decades, we appeared for lumps of anti-matter in the universe, yet under no circumstances stumbled on any. It extremely does seem that extra of one form grow to be created, than the different form. for a lengthy time period, we did not comprehend how this can be, until eventually someone stumbled on a concept of damaged symmetry. Nature extremely does have a tendency to produce a tiny more suitable share of matter than anti-matter. (And with severe-power colliders, we may be able to now make certain this). What Hawking grow to be explaining is how each little thing we've at present is the end results of this tiny imbalance. --- The "large Bang" (at the same time as this expression is meant to communicate about the starting up of the universe) grow to be no longer an explosion. It grow to be a determination (and it nonetheless is). matter (and anti-matter) were created AFTER the enlargement of the ability grow to be already below way.

Yes, you miss something: anti-matter does not have negative mass.