Which of the following is true regarding the atoms involved in a chemical reaction?
1. The same number of each type of atom will always be present before and after a chemical reaction takes place

2. Some of the atoms present before the reaction will always be lost during a chemical reaction

3. Some of the atoms will always be changed into a different type of atom by a chemical reaction

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

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.

1 is the answer to this problem