Answer:
When a sodium atom transfer over to a chlorine atom it forms a sodium cation and a chloride anion.
Explanation:
During that time both of the ions would have completely valence shells and energy wise are more stable, the reaction is usually VERY exothermic (Release of heat) which usually produces a bright yellow light.
Atoms are combining to form molecules
This corresponds to the law of multiple proportions which states that when a certain amount of compound reacts to form another compound, the ratio of the amounts between the reactants and the products are a fraction of simple or whole numbers.<span />
Answer:
Given:
Mass = 11.29 g
Volume = 2 cm³
To Find:
Density of unknown metal
Explanation:
Formula:
Substituting value of mass & volume in the formula:
Option B: 4.3
There are following rules for rounding off numbers:
1. If the rounding digit has digit less than 5 (1,2,3 and 4) to its right, all the digits on right side of the rounding digit will drop out.
2. If the rounding digit has digit equal and greater than 5 (5,6,7,8 and 9) to its right, one is added to the rounding digit.
Jeff has to weigh 4.312 g sample of NaCl. To round off the underline number 4.<u>3</u>12, check for the digit right to it. It has 1, which is less than 5 thus according to the Rule 1, all the digits on right side of the rounding digit will drop out and the number gets rounded off to 4.3.
Therefore, 4.3 is most accurate measurement by Jeff.
