1. the atomic number of an element is the total number of which particles in the
nucleus? (1 point).
neutrons
protons
electrons
protons and electrons

2. all atoms of the same element have the same (1 point)
a. number of neutrons
b. number of protons
c. mass numbers
d. mass

3. isotopes of the same element have different (1 point)
a. positions on the periodic table
b. chemical behavior
c. atomic numbers
d. mass numbers

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.