This is a 11th grade semester final that i have already finished but i need other answers to compare with mine so i can make sure they are correct. giving 30 points and whoever has the most correct ill give brainiest answer 1.fossilized dinosaurs can be dated by analyzing how many atoms are left over from reactions within the rocks over time. a. what kind of reactions are these? b. radioactive elements going through fission c. unstable elements going through chemical reactions d. atoms undergoing fusion which describes the products created from fission reactions? a. smaller atoms made of new elements, and alpha and gamma particles b. larger atoms made of a new element, and free neutrons c. the same atoms rearranged into new molecules find the atomic mass of the atom. p: 48 n: 64 a.48 b.64 c.102 d.112 e.160 james exclaims to his chemistry teacher that a new element has been discovered that fits between nickel and copper on the periodic table. mrs. nogaki calls this fake news and explains to him why this is not possible. write 2 or more sentences of what you would tell james about why this new element is not possible. question 7 options: which of the following trends increases across the periods of the periodic table, from left to right? a. electronegativity b. atomic radius c. melting point d. all of the above based on their number of valence electrons, which group of elements will gain two electrons by bonding with other atoms? a. o, s, se, te, po b. f, cl, br, i, at c. be, mg, ca, sr, ba d. n, p, as, sb, bi an atom with electronegativity 3.16 comes near to another atom with electronegativity 3.16. what will happen next? a. these atoms will form an ionic bond. b. these atoms will form a polar bond. c. these atoms will not bond. d. these atoms will form a covalent bond. given: h2so4 + 8hi → h2s + 4i2 + 4h2o how many total hydrogens are present on the reactant side of the equation? a.2 b.6 c.8 d.10 e.16 select the incorrectly balanced equation. a.4al + 3o2 → 2al2o3 b. na2co3 → na2o + co2 c. zn + 2hcl → zncl2 + h2 d.2zns + 2hcl → 4zncl2 + h2s in two more complete sentences, explain why it matters if a chemical equation is balanced or not. why must they be balanced? word bank of terms you might use in your answer (no need to use all! ): reactant atom element mass product conserved matter