unit 1
What’s the SI unit for mass?
Kilogram
How do you find the number of neutrons?
The mass number minus the atomic number.
What type of bond happens between two non-metals?
Covalent bonds.
is a water freezing a physical or chemical change?
Physical
In an isotope symbol what does the number on top represent and what does the number on the bottom represen?
The top is the mass and the bottom is the atomic number.
A compound of 3 or more elements is what type of compound?
Polyatomic compound.
What is a heterogeneous mixture?
A un-uniform mixture.
What shell of an elements Bohr model holds the valence electron?
The last shell(outside).
If the compound is Heptasilicon Triiodide, how many silicon and how many iodide is there?
7 silicon and 3 iodide.
What is the SI unit Ampere used to measure?
Electric curren.
What is the difference between electronegativity and ionization energy?
Electronegativity is how much the element wants an electron and the ion energy is the energy needed to take an electron away.
Is an ionic bond or a covalent bond stronger?
Ionic bond.
What happens to atoms in a chemical change?
the atoms are rearranged to form new bonds.
What’s the abbreviated configuration for Bismuth?
[Xe]6s^2 5d^10 6p^3
What is the formula for nitrate
NO3