Answer:
The new material that Neolithic people invent and use for making tools is bronze
This is an example of <u>self defense policy</u>.
<u>Explanation:</u>
Self defense policy is the policy that is taken to take care of the self. In case there is a threat, then to remove the threat, the policy of self defense can be used.
In this example also, since Saudi Arabia has a threat that it's rival will attack it and can cause huge damage to the country, it as a result of this takes up a measure for it's self defense. As a result of this it attacked Iran and tried to remove the threat.
The atomic number is the same as the proton number, so the answer would be 10.
Answer:
The standard atomic weight is the average mass of an element in atomic mass units. Though individual atoms always have an integer number of atomic mass units, the atomic mass on the periodic table is stated as a decimal number because it is an average of the various isotopes of an element.
