For sodium, it has 1 valence electron
For oxygen, it has 6 valence electrons
For iron, it has 2 valence electrons
Answer:
See explanation
Explanation:
Echo is the reflection of sound waves. Recall that ultrasound are also sound waves of high frequency.
When ultra sound meets an obstacle such as a bone, it is reflected backwards and gives rise to an echo back in the transducer.
Since ultrasound is high frequency sound wave wave; It does not passes through bone due to the high density of the bone, the data required may now be collected.
Answer:
gas laws involve the physical laws that describe the properties of gases.
Explanation:
Explanation:
19/9 F -1 (19 is stacked over 9 next to F) #protons: 9, #neutrons: 10, #electrons: 10
55/26 Fe +3, atomic #: 26, mass #: 55, #protons: 26, #neutrons: 29, #electrons: 23
Answer:
Litmus paper is one type of acid-base indicator. The paper is imbued with dye derived from lichens that change color in response to the presence of an acid or base. ... Red paper is used to detect alkaline pH and will turn a shade of blue in the presence of a basic solution.