The core of the 40 calcium atom, the most common isotope is symbolized by ₂₀⁴⁰ca. 1) indicate the composition of the atom of calcium. 2) calculate its mass. compare it to the core's one. what can you say ? mass of a nucleon : mnucleon = 1,67 x 10⁻²⁷ kg. mass of an electron : melctron = 9,11 x 10⁻³¹ 3) there are three other stable isotopes of calcium. knowing that they possess respectively two, three and four neutrons more than the calcium 40, to give the symbol of their core. 4) wich ion does it form ?

Microtubular fibers that assist in the movement of chromosomes during nuclear division in conjunction with proteins, makes up the small and large organelle pieces that assemble prior to translation three-base nucleotide sequence that can complementarily pair with the functional transcript, allowing a particular material to be brought to a ribosome particular time in the cell cycle when the cell’s systems determine if the cellular conditions are appropriate to continue through the cycle time in the cell’s cycle when proteins are made and organelles are duplicated enzyme that allows proper nucleotide bonding during transcription specific dna sequence which will initiate gene transcription division of the cell’s cytoplasm specific bond that forms between two amino acids when a carboxyl group binds to a amino group three-base sequence that does not code for a particular amino acid a paired organelle which facilitates the formation of movement microtubules time in the cell’s cycle when the microtubular structures exert an equal pressure on the cell’s genetic material

Particles vibrate in a rigid structure and do not move relative to their neighbors.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?