Which is true about metalloids?

a. are more metallic than non-metallic

b. next to the "staircase" on the periodic table

c. always have 4 e - in the valence shell

d. examples include Al and B

How do particles move when they are changing phases?

What type (s) of bond (s) does carbon have a tendency to form?

Homogeneous mixtures exist in a single phase (solid, liquid or gas). True False

Use the helium-4 isotope to define atomic number and mass number. why does knowledge of atomic number enable us to deduce the number of electrons present in an atom

The multiple covalent bond in a molecule of 1-butene is a (1) double covalent bond that has 6 shared electrons (2) double covalent bond that has 4 shared electrons (3) triple covalent bond that has 6 shared electrons (4) triple covalent bond that

Consider the following half-reactions: Half-reaction E° (V) I2 (s) + 2e - 2I - (aq) 0.535V 2H + (aq) + 2e - H2 (g) 0.000V Zn2 + (aq) + 2e - Zn (s) - 0.

Where did the longest tsunami form?

Calculate the number of H atoms in 0.190 mole C 6 H 14 O .

What fuel is produced by the electrolysis of water? chlorine gas hydrogen gas natural gas oxygen gas

Model describe how you would show j. j. thomson's model of the atom using small beads and clay